{"product_id":"sea-to-summit-evac-ultralight-compression-dry-bag","title":"Sea to Summit Evac Ultralight Compression Dry Bag","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003ctitle\u003eEvac Ultralight Compression Dry Bag\u003c\/title\u003e\u003cstyle\u003e\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@400;600;700;800\u0026family=Barlow:wght@300;400;500;600\u0026display=swap');\n:root { --black: #0a0a0a; --white: #ffffff; --mid: #f5f5f5; --border: #e8e8e8; --muted: #999; --body: #222; }\n* { box-sizing: border-box; margin: 0; padding: 0; }\n.spur-wrap { font-family: 'Barlow', sans-serif; background: var(--white); color: var(--black); max-width: 1100px; margin: 0 auto; padding: 48px 24px; }\n.spur-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 48px; border-bottom: 1px solid var(--border); padding-bottom: 24px; flex-wrap: wrap; 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font-weight: 300; color: #555; line-height: 1.45; }\n.size-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 8px; }\n.size-card { border: 1px solid var(--border); border-radius: 4px; padding: 14px 12px; background: var(--mid); }\n.size-name { font-family: 'Barlow Condensed', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }\n.size-stat { font-size: 11px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 2px; }\n.size-val { font-size: 13px; font-weight: 500; color: var(--body); margin-bottom: 8px; line-height: 1.4; }\n.size-val:last-child { margin-bottom: 0; }\n@media (max-width: 600px) { .spec-row { grid-template-columns: 1fr; } .spec-key { padding-bottom: 2px; } .spec-val { padding-top: 0; padding-bottom: 12px; } .size-grid { grid-template-columns: 1fr; } }\n\u003c\/style\u003e\u003cscript src=\"chrome-extension:\/\/idnnbdplmphpflfnlkomgpfbpcgelopg\/inpage.js\" id=\"xverse-wallet-provider\" data-is-priority=\"true\"\u003e\u003c\/script\u003e\u003cdiv class=\"spur-wrap\"\u003e\n\u003cdiv class=\"spur-header\"\u003e\n\u003cdiv class=\"spur-title\"\u003eEvac Ultralight Compression Dry Bag\u003c\/div\u003e\n\u003cdiv class=\"spur-meta\"\u003e30D Ultra-Sil CORDURA · Evac Air-Permeable Base · Internal-Use Compression · 5 Sizes · Bluesign APPROVED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-desc\" class=\"tab-radio\" checked\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-key\" class=\"tab-radio\"\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-specs\" class=\"tab-radio\"\u003e\u003cinput type=\"radio\" name=\"spur-tabs\" id=\"tab-care\" class=\"tab-radio\"\u003e\u003cdiv class=\"tab-nav\"\u003e\n\u003clabel for=\"tab-desc\"\u003eDescription\u003c\/label\u003e\u003clabel for=\"tab-key\"\u003eKey Features\u003c\/label\u003e\u003clabel for=\"tab-specs\"\u003eSpecifications\u003c\/label\u003e\u003clabel for=\"tab-care\"\u003eCare\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cscript\u003e\n(function(){\n var names = ['desc','key','specs','care'];\n function show(n){\n names.forEach(function(t){\n var panel = document.querySelector('.' + t + '-panel');\n if(panel) panel.style.setProperty('display', (t === n) ? 'block' : 'none', 'important');\n });\n }\n names.forEach(function(t){\n var input = document.getElementById('tab-' + t);\n if(input) input.addEventListener('change', function(){ show(t); });\n var label = document.querySelector('label[for=\"tab-' + t + '\"]');\n if(label) label.addEventListener('click', function(){\n show(t);\n var inp = document.getElementById('tab-' + t);\n if(inp) inp.checked = true;\n });\n });\n show('desc');\n})();\n\u003c\/script\u003e\u003cdiv class=\"spur-panels\"\u003e\n\u003c!-- DESCRIPTION PANEL --\u003e\u003cdiv class=\"tab-panel desc-panel\"\u003e\u003cp class=\"desc-intro\"\u003ePerfect dry compression storage to keep gear reliably dry and compact inside a backpack or bike bag. Made from bluesign APPROVED ultra lightweight Ultra-Sil 30D Cordura® nylon with an EVAC fabric air-permeable base. Squeeze air out while keeping the contents dry, without the need for an old-fashioned purge valve — compression straps make it easy to evenly compress soft items. Simple, extremely light and reliable — the perfect dry compression solution for internal use.\u003c\/p\u003e\u003c\/div\u003e\n\u003c!-- KEY FEATURES PANEL --\u003e\u003cdiv class=\"tab-panel key-panel\"\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eInternal Use Optimized\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eDesigned for use INSIDE a backpack, bike bag, or duffel — not for external\/paddle.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eCompression Straps by Size\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e3L-8L: 2 ladderlock + 1 SR buckle. 13L-20L: 2 ladderlock + 2 SR buckles (more compression control).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eField Repair Buckle\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003ePatented STS Field Repair Buckle — user-replaceable in the field.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eBluesign APPROVED\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eChemical safety verified throughout the supply chain.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eeVac Air-Permeable Base\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eSqueeze air OUT for compression · water stays IN — same STS Evac tech.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eSize Comparison (5 Sizes × 2 Colors)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eUltra-Sil 30D CORDURA® (LIGHTER THAN LIGHTWEIGHT 70D)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eThe Ultralight uses \u003cstrong\u003eUltra-Sil 30D CORDURA®\u003c\/strong\u003e — significantly lighter than the Lightweight Compression's 70D:\n\n\u003cstrong\u003eWhat 30D means:\u003c\/strong\u003e\n- 30 denier per fiber (vs 70D in Lightweight — over half the thickness)\n- Even thinner than the Lightweight\n- UltraSil = STS's proprietary ultra-light fabric technology (same family as DryLite towel)\n\n\u003cstrong\u003eWhy \"Ultra-Sil\" matters:\u003c\/strong\u003e\n- STS's specially treated nylon for ultralight\n- High strength-to-weight ratio\n- Sufficient for internal pack use (no abrasion against external objects)\n\n\u003cstrong\u003eTrade-off matrix:\u003c\/strong\u003e\n\n| Aspect | 30D Ultralight | 70D Lightweight | 420D HD |\n|---|---|---|---|\n| Weight (20L) | \u003cstrong\u003e110 g \/ 3.9 oz\u003c\/strong\u003e | 160 g \/ 5.6 oz | 370 g \/ 13.1 oz |\n| Hydrostatic Head | \u003cstrong\u003e2000 mm\u003c\/strong\u003e | 10,000 mm | 10,000 mm |\n| Abrasion Resistance | Low (internal only) | Moderate | \u003cstrong\u003eHigh\u003c\/strong\u003e |\n| Tear Strength | Light | Moderate | \u003cstrong\u003eHigh\u003c\/strong\u003e |\n| Best For | Internal pack use | General outdoor | Vehicle \/ rugged |\n| Cost | $39.95-$59.95 | $39.95-$59.95 | $59.95-$89.95 |\n\n\u003cstrong\u003eThe 30D is durable enough for:\u003c\/strong\u003e\n- Backpacking (inside a pack)\n- Internal compression of soft items\n- Modular backpack organization\n- Sleeping bag storage inside a duffel or backpack\n\n\u003cstrong\u003eThe 30D is NOT appropriate for:\u003c\/strong\u003e\n- \"Paddle sports\" or sharp\/abrasive elements (per FAQ)\n- External bike cargo mounting (use Evac Bikepack or HD)\n- Vehicle\/luggage use (use HD)\n- Heavy loading or sharp contacts\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003e2000mm Hydrostatic Head (vs 10,000mm elsewhere)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eThe Ultralight has only \u003cstrong\u003e2000mm hydrostatic head\u003c\/strong\u003e vs the 10,000mm of the Lightweight and HD:\n\n\u003cstrong\u003eWhat 2000mm means:\u003c\/strong\u003e\n- Lower than the 10,000mm in other Evac products\n- Sufficient for \"storage inside a backpack or duffle\" (per STS FAQ)\n- Not sufficient for direct water exposure (paddle, kayak, submersion)\n\n\u003cstrong\u003ePer FAQ:\u003c\/strong\u003e \"Is this dry bag waterproof? The body of the dry bag is waterproof enough (2000+ mm hydrostatic head) for use as storage inside a backpack or duffle. However, for water sports or general, external use we recommend compression dry bags with a higher hydrostatic head\/more abrasion and puncture-resistant fabrics.\"\n\n\u003cstrong\u003eThe key insight:\u003c\/strong\u003e\n- 2000mm = waterproof enough for INTERNAL pack use\n- Your pack\/bag provides additional water protection\n- The Evac Compression UL is a SECOND layer of waterproofing, not primary\n\n\u003cstrong\u003eWhy this matters:\u003c\/strong\u003e\n- This is the lightest in the line BECAUSE it's the least waterproof\n- Trade-off: thinner fabric + less coating = less weight, less waterproof\n- Use it inside other containers (packs, bags)\n- Don't use as a stand-alone waterproof for paddle sports\n\n\u003cstrong\u003eIf you need waterproof + ultralight:\u003c\/strong\u003e\n- Use Ultralight INSIDE a 100% waterproof outer (pack liner)\n- The Ultralight keeps gear organized + compressed\n- The pack liner keeps water out\n- Combined: ultralight packing + full waterproofing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eCompression Strap Configuration by Size (NEW VARIANT)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eThe Ultralight uses a \u003cstrong\u003evariable strap configuration\u003c\/strong\u003e by size — a unique design compared to other Evac products:\n\n\u003cstrong\u003ePer STS:\u003c\/strong\u003e \"the 3L, 5L and 8L include two ladderlock straps and one side-release buckle strap while the 13L and 20L include two ladderlock straps and two side-release buckle straps for maximum compression control on larger loads.\"\n\n\u003cstrong\u003eWhy different per size:\u003c\/strong\u003e\n- \u003cstrong\u003eSmaller bags (3L, 5L, 8L):\u003c\/strong\u003e Less compression needed — 1 SR buckle is sufficient (faster open)\n- \u003cstrong\u003eLarger bags (13L, 20L):\u003c\/strong\u003e More compression control needed — 2 SR buckles for finer adjustment\n\n\u003cstrong\u003eLadderlock Buckles (both sizes):\u003c\/strong\u003e\n- 2 per bag\n- Permanent tension (wrap around and pull through)\n- Stay tight without holding them\n- Main compression force\n\n\u003cstrong\u003eSide-Release Buckles:\u003c\/strong\u003e\n- 1 small \/ 2 large\n- Quick-release (snap apart)\n- Easier to open without re-tensioning ladderlock\n- For accessing contents without fully unthreading\n\n\u003cstrong\u003eWhy this matters:\u003c\/strong\u003e\n- More compression control = denser pack\n- But not heavy (just plastic buckles)\n- Trade-off between compression power + ease of access\n\n\u003cstrong\u003ePractical:\u003c\/strong\u003e\n- 13L+ bags: 2 SR buckles = adjust each side independently\n- Smaller bags: 1 SR buckle = faster open\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003e\"Internal Use Only\" Positioning (Per FAQ)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003ePer STS FAQ: \"this dry bag is for use as storage inside a backpack or duffle. However, for water sports or general, external use we recommend compression dry bags with a higher hydrostatic head\/more abrasion and puncture-resistant fabrics.\"\n\n\u003cstrong\u003eWhat \"internal use\" means:\u003c\/strong\u003e\n- Lives INSIDE a backpack, duffel, or larger container\n- Protected from external abrasion by the outer container\n- Touches soft items only (clothes, sleeping bag)\n- Not exposed to weather independently\n\n\u003cstrong\u003eWhat's wrong with external use:\u003c\/strong\u003e\n- 30D fabric too thin for sharp\/abrasive contact\n- 2000mm hydrostatic not enough for direct rain\n- Lightweight buckle attachment = not for vehicle straps\n\n\u003cstrong\u003eUse examples INTERNAL:\u003c\/strong\u003e\n- Inside your hiking backpack\n- Inside your duffel for travel\n- Inside your pannier\n- Inside your framebag (bikepacking)\n\n\u003cstrong\u003eUse examples for OTHER Evac products (NOT this one):\u003c\/strong\u003e\n- Bike cargo cage mounting (Evac Bikepack Set)\n- Vehicle mounting (HD, Compression HD)\n- Paddle sports (Lightweight)\n- Submersion anywhere (Heavy Duty)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eevac Air-Permeable Base (Same Technology)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eSame STS evac Fabric at the base across all Evac products:\n\n\u003cstrong\u003ePer STS:\u003c\/strong\u003e \"Waterproof and air-permeable Evac fabric base allows air to be pushed out but water can't get in\"\n\n\u003cstrong\u003eWhy UL has the same Evac base:\u003c\/strong\u003e\n- Compression works only if air can escape\n- The Evac base enables the compression feature\n- Without Evac = sealed bag = puffy bag = no compression\n\n\u003cstrong\u003eFor UL specifically:\u003c\/strong\u003e\n- The thin 30D fabric needs the Evac base for performance\n- Even with thin fabric, compression works\n- Air gets pushed out + water can't get in\n- Reliable technology across the line\n\n\u003cstrong\u003eLimitations:\u003c\/strong\u003e\n- Air goes BOTH directions (per FAQ — not one-way)\n- Compression requires tight surrounding packing\n- For sustained compression, use with a snug pack\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003ePackrafting + Modular Packing (Per FAQ)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003ePer STS FAQ: \"Does this bag work for modular packing in a backpack? Yes! Use these bags for all compressible items. First, squeeze the air out, then pack the dry bag into a tight space in your bag or pack so it does not draw itself full of air again. It works wonders on sleeping bags and insulated clothing.\"\n\n\u003cstrong\u003eModular packing setup (UL optimized):\u003c\/strong\u003e\n- 3L = down jacket\n- 5L = base layers + socks\n- 8L = sleeping bag\n- 13L = sleeping bag + clothing\n- 20L = bulk items (multiple)\n\n\u003cstrong\u003eEach bag goes into its own compartment:\u003c\/strong\u003e\n- Sleeping bag at bottom\n- Clothing in middle\n- Accessories up top\n- Each bag squeezes air + compresses independently\n\n\u003cstrong\u003eThe UL's advantage for modular packing:\u003c\/strong\u003e\n- Lightest fabrics (per size)\n- All 5 sizes work together\n- Compression works inside other bags\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eComparison: Evac Family Now 5 Products\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eFive Evac products now built:\n\n| Aspect | \u003cstrong\u003eEvac Ultralight Compression (this)\u003c\/strong\u003e | Evac Lightweight Compression | Evac Compression HD | Evac Lightweight Dry Bag | Evac Bikepack Set |\n|---|---|---|---|---|---|\n| \u003cstrong\u003eType\u003c\/strong\u003e | Compression Sack | Compression Sack | Compression Sack | Dry Bag | Storage\/Packs |\n| \u003cstrong\u003eBody Fabric\u003c\/strong\u003e | \u003cstrong\u003e30D Ultra-Sil CORDURA®\u003c\/strong\u003e | 70D recycled nylon | 420D TPU-laminated | 70D recycled nylon | 420D HD |\n| \u003cstrong\u003eHydrostatic Head\u003c\/strong\u003e | \u003cstrong\u003e2000 mm\u003c\/strong\u003e | 10,000 mm | 10,000 mm | 10,000 mm | 10,000 mm |\n| \u003cstrong\u003eUse Position\u003c\/strong\u003e | \u003cstrong\u003eINTERNAL only\u003c\/strong\u003e | General | Vehicle\/rugged | General | Bike cargo cage |\n| \u003cstrong\u003eCompression\u003c\/strong\u003e | Yes (3-strap or 4-strap) | Yes (4-strap) | Yes (4-strap) | Manual only (no straps) | No |\n| \u003cstrong\u003eWeight (20L)\u003c\/strong\u003e | \u003cstrong\u003e110 g \/ 3.9 oz\u003c\/strong\u003e | 160 g \/ 5.6 oz | 370 g \/ 13.1 oz | 95 g \/ 3.4 oz | 333 g \/ 11.7 oz (set) |\n| \u003cstrong\u003eShape\u003c\/strong\u003e | Round | Round | Oval | Oval | Oval |\n| \u003cstrong\u003eStrap Config\u003c\/strong\u003e | 3L-8L: 2+1 · 13L-20L: 2+2 | 2+2 | 2+2 | Manual only | N\/A |\n| \u003cstrong\u003eSizes\u003c\/strong\u003e | \u003cstrong\u003e3L-20L (5)\u003c\/strong\u003e | 5L-35L (5) | 8L-35L (4) | 3L-35L (6) | 2 × 3.7L |\n| \u003cstrong\u003eColors\u003c\/strong\u003e | \u003cstrong\u003eHigh Rise + Blue Atoll\u003c\/strong\u003e | Turkish Tile + High Rise | Beluga | Beluga + Turkish Tile | Beluga + Turkish Tile |\n| \u003cstrong\u003eRecycled\u003c\/strong\u003e | No (Ultra-Sil trade-off) | Yes (100% pre-consumer) | No | Yes (100%) | No |\n| \u003cstrong\u003ePrice (largest)\u003c\/strong\u003e | \u003cstrong\u003e$59.95 (20L)\u003c\/strong\u003e | $59.95 (35L) | $89.95 (35L) | $49.95 (35L) | $110 (set) |\n| \u003cstrong\u003eBest For\u003c\/strong\u003e | Ultralight internal pack use | General compression | Rugged vehicle compression | Simple dry storage | Bikepacking |\n\n\u003cstrong\u003eChoose Ultralight Compression (this) for:\u003c\/strong\u003e\n- Maximum weight savings\n- Internal pack \/ duffel \/ pannier use\n- Modular backpack organization\n- Soft items only (no sharp contact)\n\n\u003cstrong\u003eChoose Lightweight Compression for:\u003c\/strong\u003e\n- Same weight class + recycled material\n- External outdoor use (more waterproof)\n- Paddle sports (per FAQ recommendation)\n\n\u003cstrong\u003eChoose HD Compression for:\u003c\/strong\u003e\n- Motorcycling, snowmobiling, kayak\n- External rugged storage\n- Highest durability\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eBest Use Cases\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003eBackpacking (PRIMARY):\u003c\/strong\u003e\n- Internal pack use\n- Modular organization\n- Smallest + lightest in the line\n- Multiple bags for full kit\n\n\u003cstrong\u003eBikepacking (internal):\u003c\/strong\u003e\n- Inside frame bags\n- Inside handlebar rolls\n- For cargo cage use, see Evac Bikepack Set instead\n\n\u003cstrong\u003eTravel \/ Duffel Organization:\u003c\/strong\u003e\n- Inside luggage for clothing + soft items\n- Color-coded by category\n- Modular packing\n\n\u003cstrong\u003ePackrafting (per FAQ):\u003c\/strong\u003e\n- Inside the packraft's dry hatch\n- Lightweight padding\n- Modular categories\n\n\u003cstrong\u003eNOT for:\u003c\/strong\u003e\n- Paddle sports (per FAQ: \"Featherweight fabrics are not appropriate for the sharp or abrasive elements in water sports. We recommend our Lightweight Dry Bags for general paddle use.\")\n- External bike cargo (use the Evac Bikepack Set)\n- Vehicle\/rugged (use HD)\n\n\u003cstrong\u003eModular Backpack System:\u003c\/strong\u003e\n- Sleep bag in 8L or 13L\n- Clothes in 8L (separate layers)\n- Puffy jacket in 3L or 5L\n- All inside the same pack\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eCompatible Accessories\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003eSTS Field Repair Buckle (15mm, replacement):\u003c\/strong\u003e\n- Same part as other Evac products\n- Compatible with HD + Lightweight + UL\n\n\u003cstrong\u003eBackpacking Pack with Internal Frame:\u003c\/strong\u003e\n- Use UL bags stacked inside\n- Compression bands on the outer pack\n\n\u003cstrong\u003eDuffel Bag:\u003c\/strong\u003e\n- Use UL bags for organized clothing\n- Compression maintains pack density\n\n\u003cstrong\u003eSleeping Bag Stuff Sack:\u003c\/strong\u003e\n- Replace heavier stuff sack with UL\n- Lighter + still compressible\n\n\u003cstrong\u003eTSA Locks:\u003c\/strong\u003e\n- For luggage (UL bags can be locked)\n\n\u003cstrong\u003ePatch Kit:\u003c\/strong\u003e\n- Tenacious Tape for field repairs\n\n\u003cstrong\u003eBungee Cords:\u003c\/strong\u003e\n- For external compression reinforcement\n- Wrap packs tightly for sustained compression\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS PANEL --\u003e\u003cdiv class=\"tab-panel specs-panel\"\u003e\n\u003cp class=\"spec-category\"\u003ePerformance\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBest Use\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003eINTERNAL pack\/duffel\/pannier storage\u003c\/strong\u003e · Backpacking · Modular backpack organization · Travel\/dry bag organization · Bikepacking (internal)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eActivity Tier\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003eUltralight\u003c\/strong\u003e (57-110 g \/ 2.0-3.9 oz — lightest in the Evac line)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eUse Position\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003eINTERNAL only\u003c\/strong\u003e (per FAQ — \"for storage inside a backpack or duffle\")\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eHydrostatic Head\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003e2000 mm\u003c\/strong\u003e (sufficient for internal-use only)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCompression\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eYes (variable strap configuration by size — 3L-8L: 3 straps; 13L-20L: 4 straps)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"spec-category\"\u003eConstruction\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBody Material\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003e30D Ultra-Sil CORDURA® nylon\u003c\/strong\u003e (bluesign APPROVED, non-PFAS DWR) — thinner than Lightweight (70D)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBase Material\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eEvac fabric (air-permeable waterproof — air OUT, water IN)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eClosure\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eHypalon roll-top (waterproof roll-top closure, secured with Field Repair Buckle)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSeams\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eDouble-stitched + tape-sealed\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBuckle\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003ePatented Field Repair Buckle (15mm Polyformaldehyde)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eShape\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eRound\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"spec-category\"\u003eSustainability\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eRecycled Fabric\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eNo (Ultra-Sil fabric is not recycled — trade-off for ultralight)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBluesign® APPROVED\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eYes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eNon-PFAS DWR\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eYes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"spec-category\"\u003eSizes \u0026amp; Dimensions\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e3L (Compact)\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSKU A4236 · 13.2 × 13.2 × 26.7 cm \/ 5 × 5 × 11 in · 57 g \/ 2.0 oz · 2 ladderlock + 1 SR buckle straps · $39.95\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e5L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSKU A4237 · 15.2 × 15.2 × 31.5 cm \/ 6 × 6 × 12 in · 64 g \/ 2.3 oz · 2 ladderlock + 1 SR buckle straps · $44.95\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e8L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSKU A4238 · 17.9 × 17.9 × 37.7 cm \/ 7 × 7 × 15 in · 76 g \/ 2.7 oz · 2 ladderlock + 1 SR buckle straps · $49.95\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e13L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSKU A4239 · 21 × 21 × 43.2 cm \/ 8 × 8 × 17 in · 94 g \/ 3.3 oz · 2 ladderlock + 2 SR buckle straps · $54.95\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e20L (Extra-Large) — THIS\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSKU A4240 · 24.2 × 24.2 × 47.6 cm \/ 10 × 10 × 19 in · 110 g \/ 3.9 oz · 2 ladderlock + 2 SR buckle straps · $59.95\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"spec-category\"\u003eColor Variants (2 colors)\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eHigh Rise\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eLight color · All sizes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBlue Atoll\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eLight blue · All sizes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"spec-category\"\u003eProfile\u003c\/p\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBrand\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSea to Summit (Australian outdoor gear, founded 1983, Boulder CO US HQ)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCategory\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eCompression Sacks \/ Ultralight Dry Bags \/ Backpacking Compression Sacks \/ Modular Packing Bags\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eLaunch\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e25NewProduct (May 2025)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003ePosition in STS Lineup\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e\n\u003cstrong\u003eLightest-weight\u003c\/strong\u003e compression dry bag (Ultralight internal-use compression)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CARE PANEL --\u003e\u003cdiv class=\"tab-panel care-panel\"\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eInternal-Use Only (Per FAQ)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003ePer STS FAQ:\u003c\/strong\u003e \"this dry bag is for use as storage inside a backpack or duffle.\"\n\n\u003cstrong\u003eWhat this means practically:\u003c\/strong\u003e\n- The 30D fabric is too thin for external abrasion\n- The 2000mm hydrostatic head is sufficient only for internal pack use\n- Your backpack provides the primary water protection\n\n\u003cstrong\u003eDon't:\u003c\/strong\u003e\n- Mount externally on a bike (use the Evac Bikepack Set instead)\n- Use for paddle sports (the FAQ specifically recommends the Lightweight Dry Bags or HD for paddle use)\n- Expose to direct rain for extended periods (use pack liner + UL inside)\n- Drag across rocks (30D is delicate)\n- Use as primary waterproof (the pack is the primary)\n\n\u003cstrong\u003ePractical use:\u003c\/strong\u003e\n- Pack the UL bag inside your backpack or duffel\n- The pack's fabric protects the UL from abrasion\n- The UL provides organization + light waterproofing\n- If water gets through the pack, the UL provides second defense\n\n\u003cstrong\u003eIf water gets through both layers:\u003c\/strong\u003e\n- Critical items (electronics, documents) go in additional waterproofing\n- UL is sufficient for sleeping bags + clothes (which can be dried)\n- Critical items need dry bags or hard cases\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eHandling 30D Fabric (FRAGILE)\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\nThe 30D is the \u003cstrong\u003ethinnest fabric\u003c\/strong\u003e in the Evac line. Handle with care:\n\n\u003cstrong\u003eAvoid:\u003c\/strong\u003e\n- Sharp objects (needles, fishing hooks, dog claws)\n- Walking on the bag\n- Dragging across rough surfaces\n- Pointed tools in the same bag\n- Excessive compression long-term (degrades insulation inside)\n\n\u003cstrong\u003eStorage:\u003c\/strong\u003e\n- Clean and dry before storing\n- Store LOOSE (not compressed for months)\n- Avoid direct sunlight long-term (degrades 30D)\n\n\u003cstrong\u003eRepair (30D-specific):\u003c\/strong\u003e\n- Small holes: use Tenacious Tape or similar\n- Larger tears: send for repair\n- 30D is harder to repair than 70D (thinner material)\n- Field repair kits work but check carefully\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eSubmersion Warning (Per FAQ) — Different for UL\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003ePer STS FAQ:\u003c\/strong\u003e \"Is this dry bag waterproof? The body of the dry bag is waterproof enough (2000+ mm hydrostatic head) for use as storage inside a backpack or duffle. \u003cstrong\u003eHowever, for water sports or general, external use we recommend compression dry bags with a higher hydrostatic head\/more abrasion and puncture-resistant fabrics.\u003c\/strong\u003e\"\n\n\u003cstrong\u003eDifferent from other Evac products:\u003c\/strong\u003e\n- Other Evac: 10,000mm + general external use OK\n- UL: 2000mm + INTERNAL USE ONLY\n\n\u003cstrong\u003eThe UL is for:\u003c\/strong\u003e\n- Dry bag inside your pack → pack handles waterproofing\n- Layered waterproofing strategy\n- Modular backpack organization\n\n\u003cstrong\u003eChoose another product if you need:\u003c\/strong\u003e\n- Paddle sports (use Lightweight Dry Bags per FAQ)\n- External bike cargo (use Evac Bikepack Set)\n- Vehicle \/ rugged (use HD Compression)\n\n\u003cstrong\u003eWhy this disclaimer exists:\u003c\/strong\u003e\n- The 30D + 2000mm combo is the lighter end\n- It's not designed to survive submersion\n- Marketing team wants users to use the right product for the job\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eField Repair\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003ePatching tears:\u003c\/strong\u003e\n- Use Tenacious Tape or similar nylon repair tape\n- Apply to clean, dry surface\n- Round the patch corners\n- Apply to both sides for strength\n- 30D is thinner than 70D — patching is more challenging\n\n\u003cstrong\u003eField Repair Buckle replacement:\u003c\/strong\u003e\n- 15mm replacement buckle (compatible with other Evac products)\n- Pin removal: small flat-head screwdriver or fingernail\n- Snap in the new buckle (no tools)\n\n\u003cstrong\u003eSeam leaks:\u003c\/strong\u003e\n- Apply seam seal (SilNet) over the affected area\n- Allow to cure before next use\n- 30D may have more seam issues than 70D (thinner threads)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eCleaning\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003eRoutine cleaning:\u003c\/strong\u003e\n- Mild soap + warm water\n- Soft cloth or sponge\n- Wipe down exterior + interior\n- Air dry fully before storing\n\n\u003cstrong\u003eAvoid:\u003c\/strong\u003e\n- Harsh detergents or bleach (degrades 30D + Hypalon + eVac)\n- Machine washing (agitator damages seams)\n- High-pressure sprays\n- Storing wet (mildew)\n- Scrubbing (30D is thin — don't scrub hard)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eCompression Use Best Practices\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e\n\u003cstrong\u003eDon't over-compress long-term:\u003c\/strong\u003e\n- Down\/synthetic insulation loses lo\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sea to Summit","offers":[{"title":"Blue Atoll \/ 3L","offer_id":52743307821376,"sku":"A4236-33","price":39.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 5L","offer_id":52743307854144,"sku":"A4237-33","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 8L","offer_id":52743307886912,"sku":"A4238-33","price":49.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 13L","offer_id":52743307919680,"sku":"A4239-33","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 20L","offer_id":52743307952448,"sku":"A4240-33","price":59.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 3L","offer_id":52743307985216,"sku":"A4236-11","price":39.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 5L","offer_id":52743308017984,"sku":"A4237-11","price":44.95,"currency_code":"USD","in_stock":false},{"title":"High Rise \/ 8L","offer_id":52743308050752,"sku":"A4238-11","price":49.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 13L","offer_id":52743308083520,"sku":"A4239-11","price":54.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 20L","offer_id":52743308116288,"sku":"A4240-11","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7487\/5549\/files\/A4236-33_abe99bf3-0f8b-44e6-a3b7-510d95a179dd.jpg?v=1783364310","url":"https:\/\/spokex.com\/products\/sea-to-summit-evac-ultralight-compression-dry-bag","provider":"SX Collective","version":"1.0","type":"link"}