{"product_id":"sea-to-summit-ultra-sil-compression-sack","title":"Sea to Summit Ultra-Sil Compression Sack","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003ctitle\u003eUltra-Sil Compression Sack\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; gap: 12px; }\n.spur-title { font-family: 'Barlow Condensed', sans-serif; font-size: clamp(28px, 5vw, 48px); font-weight: 800; letter-spacing: -0.02em; line-height: 1; text-transform: uppercase; }\n.spur-meta { font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }\n.tab-radio { display: none; }\n.tab-nav { display: flex; gap: 4px; margin-bottom: 32px; flex-wrap: wrap; }\n.tab-nav label { font-family: 'Barlow Condensed', sans-serif; font-size: 14px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 10px 24px; background: var(--mid); color: var(--muted); border: 1px solid var(--border); cursor: pointer; transition: all 0.15s; border-radius: 2px; display: inline-block; user-select: none; }\n.tab-nav label:hover { color: var(--black); border-color: #aaa; }\n.spur-panels .tab-panel { display: none; }\n#tab-desc:checked ~ .tab-nav label[for=\"tab-desc\"],\n#tab-key:checked ~ .tab-nav label[for=\"tab-key\"],\n#tab-specs:checked ~ .tab-nav label[for=\"tab-specs\"],\n#tab-care:checked ~ .tab-nav label[for=\"tab-care\"] { background: var(--black); color: var(--white); border-color: var(--black); }\n#tab-desc:checked ~ .spur-panels .desc-panel { display: block; }\n#tab-key:checked ~ .spur-panels .key-panel { display: block; }\n#tab-specs:checked ~ .spur-panels .specs-panel { display: block; }\n#tab-care:checked ~ .spur-panels .care-panel { display: block; }\n.spur-panel p { font-size: 14px; font-weight: 300; line-height: 1.7; color: var(--body); margin-bottom: 16px; }\n.desc-intro { font-size: 16px; font-weight: 400; line-height: 1.65; color: var(--body); margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }\n.key-section { border-bottom: 1px solid var(--border); padding: 16px 0; }\n.key-section:last-child { border-bottom: none; }\n.key-title { font-family: 'Barlow Condensed', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px; }\n.key-desc { font-size: 14px; font-weight: 300; color: var(--body); line-height: 1.5; }\n.spec-row { display: grid; grid-template-columns: 220px 1fr; border-bottom: 1px solid var(--border); }\n.spec-key { font-size: 12px; font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); padding: 12px 16px 12px 0; }\n.spec-val { font-size: 14px; font-weight: 300; color: var(--body); padding: 12px 0; line-height: 1.5; }\n.spec-category { font-family: 'Barlow Condensed', sans-serif; font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; margin: 24px 0 8px 0; color: var(--muted); }\n.spec-category:first-child { margin-top: 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; } }\nhtml[data-theme=\"dark\"] { --black: #f0f0f0; --white: #0a0a0a; --mid: #1a1a1a; --border: #333; --muted: #888; --body: #ccc; }\nhtml[data-theme=\"dark\"] .spur-panels { background: var(--white); }\nhtml[data-theme=\"dark\"] .key-section { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .spur-header { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .desc-intro { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .spec-row { border-color: var(--border); }\nhtml[data-theme=\"dark\"] .tab-nav label { background: #1a1a1a; color: #888; border-color: #333; }\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\"\u003eUltra-Sil Compression Sack\u003c\/div\u003e\n\u003cdiv class=\"spur-meta\"\u003eUltra-Sil 30D Nylon · C0 non-PFAS DWR · 2000 mm HH · 5 Sizes · 53–118 g\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\u003cdiv class=\"spur-panels\"\u003e\n\u003c!-- DESCRIPTION PANEL --\u003e\u003cdiv class=\"tab-panel desc-panel\"\u003e\u003cp class=\"desc-intro\"\u003eThe Ultra-Sil Compression Sack trims bulky soft gear — sleeping bags, insulated jackets, puffy layers — down by roughly two thirds of their uncompressed volume without dragging serious weight into the pack. The bluesign-approved Ultra-Sil 30D nylon shell is treated with a C0 non-PFAS DWR so it shrugs off light rain and condensation inside the pack, while three ultralight compression straps (two ladderlock, one side-release) cinch the contents fast and release even faster at camp. The attached flip-top lid keeps the straps from tangling in transit.\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\"\u003e~⅔ Volume Compression\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eCompresses soft contents down by as much as two thirds of their uncompressed volume, opening pack space for layers, food, or essentials.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eUltra-Sil 30D Nylon\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eLightweight 30-denier nylon shell with a higher tear strength than its weight suggests — tough enough for repeated stuffing and unstuffing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eC0 non-PFAS DWR Finish\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eWater-resistant C0 DWR (no PFAS chemicals) sheds light rain and pack condensation without relying on forever-chemical treatments.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eBluesign APPROVED Fabric\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eShell fabric is bluesign APPROVED, certifying responsible use of resources and reduced environmental impact in the manufacturing chain.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003e2000 mm Hydrostatic Head\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eFabric resists 2000 mm of water pressure — enough to shed pack condensation, brief rain exposure, and wet grass. Not a substitute for a dry bag.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003e3 Compression Straps\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eThree ultralight compression straps with two ladderlock buckles and one side-release buckle let you cinch down tight and pop the sack open with one hand.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eFlip-Top Lid\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eAttached flip-top lid keeps the compression straps from tangling with other gear in your pack or travel bag.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eFive Sizes\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003e5L, 8L, 13L, 20L, and 35L sizes cover everything from a single puffy jacket to a full sleeping bag plus layers.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS PANEL --\u003e\u003cdiv class=\"tab-panel specs-panel\"\u003e\n\u003cdiv class=\"spec-category\"\u003eSizes \u0026amp; Pricing\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e5L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e53 g · 15.2 × 15.2 × 29.6 cm \/ 6 × 6 × 12 in\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\"\u003e64 g · 18.1 × 18.1 × 35.5 cm \/ 7 × 7 × 14 in\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\"\u003e82 g · 20.5 × 20.5 × 43.3 cm \/ 8 × 8 × 17 in\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e20L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e96 g · 24 × 24 × 47.5 cm \/ 9 × 9 × 19 in\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003e35L\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e118 g · 28.8 × 28.8 × 57.8 cm \/ 11 × 11 × 23 in\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eVariants\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eColorways Available\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e3 (varies by size)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBest Use\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eUltralight \/ Backpacking · Travel · Internal Storage\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eMaterials\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSack Fabric\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% Nylon (Ultra-Sil 30D, bluesign APPROVED, C0 non-PFAS DWR)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eBuckles\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% POM\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWebbing\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e100% PP\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003ePerformance\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eHydrostatic Head\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e2000 mm (water resistant — not waterproof)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eCompression Ratio\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eUp to ~⅔ volume reduction\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=\"key-desc\" style=\"font-size: 13px; padding: 8px 0;\"\u003eDrawcord neck with attached flip-top lid and 3 compression straps\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-category\"\u003eWhat's Included\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eIn Box\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e1 × Ultra-Sil Compression Sack\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWarranty\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eSea to Summit Lifetime Guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CARE PANEL --\u003e\u003cdiv class=\"tab-panel care-panel\"\u003e\n\u003cp\u003eHand wash with mild soap and lukewarm water; rinse thoroughly and air dry away from direct sunlight.\u003c\/p\u003e\n\u003cp\u003eDo not machine wash or tumble dry — the agitation and heat damage the C0 DWR finish and stress the taped seams.\u003c\/p\u003e\n\u003cp\u003eRe-treat the DWR periodically with a bluesign-approved wash-in or spray-on restorer to keep water beading up.\u003c\/p\u003e\n\u003cp\u003eAvoid prolonged UV exposure when storing; the 30D nylon and PU coating will degrade faster in direct sunlight.\u003c\/p\u003e\n\u003cp\u003eStuff rather than fold for long-term storage to maintain the DWR treatment and protect seam tape.\u003c\/p\u003e\n\u003cp\u003eThis sack is water resistant, not waterproof — for full submersion protection or use in wet conditions, pair with a dry bag inside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv id=\"torrent-scanner-popup\" style=\"display: none;\"\u003e\u003c\/div\u003e","brand":"Sea to Summit","offers":[{"title":"Blue Atoll \/ 5L","offer_id":52743333445952,"sku":"A4531-33","price":34.95,"currency_code":"USD","in_stock":false},{"title":"Blue Atoll \/ 8L","offer_id":52743333478720,"sku":"A4532-33","price":39.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 13L","offer_id":52743333511488,"sku":"A4533-33","price":44.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 20L","offer_id":52743333544256,"sku":"A4534-33","price":49.95,"currency_code":"USD","in_stock":true},{"title":"Blue Atoll \/ 35L","offer_id":52743333577024,"sku":"A4535-33","price":54.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 5L","offer_id":52743333609792,"sku":"A4531-11","price":34.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 8L","offer_id":52743333642560,"sku":"A4532-11","price":39.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 13L","offer_id":52743333675328,"sku":"A4533-11","price":44.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 20L","offer_id":52743333708096,"sku":"A4534-11","price":49.95,"currency_code":"USD","in_stock":true},{"title":"High Rise \/ 35L","offer_id":52743333740864,"sku":"A4535-11","price":54.95,"currency_code":"USD","in_stock":true},{"title":"Zinnia \/ 5L","offer_id":52743333773632,"sku":"A4531-51","price":34.95,"currency_code":"USD","in_stock":false},{"title":"Zinnia \/ 8L","offer_id":52743333806400,"sku":"A4532-51","price":39.95,"currency_code":"USD","in_stock":false},{"title":"Zinnia \/ 13L","offer_id":52743333839168,"sku":"A4533-51","price":44.95,"currency_code":"USD","in_stock":false},{"title":"Zinnia \/ 20L","offer_id":52743333871936,"sku":"A4534-51","price":49.95,"currency_code":"USD","in_stock":false},{"title":"Zinnia \/ 35L","offer_id":52743333904704,"sku":"A4535-51","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7487\/5549\/files\/A4531-33_35826580-b63e-4cf1-ba6d-37a29a12d741.jpg?v=1783364482","url":"https:\/\/spokex.com\/products\/sea-to-summit-ultra-sil-compression-sack","provider":"SX Collective","version":"1.0","type":"link"}