Premium goose down — exceptional warmth-to-weight ratio (rare in this loft).

Ethically sourced down under Responsible Down Standard — animal welfare verified.

Non-PFAS hydrophobic treatment — down stays drier in damp conditions.

STS-specific attachment to sleeping bags — thermal boost for cold weather.

2 temp ratings (45°F and 30°F) — vents in warm, cinches in cold.

14.9-21.8 oz depending on size — ultralight category for backpackers.

The Ember Quilt uses 850+ fillpower goose down — premium loft: What "fillpower" measures: - Cubic inches one ounce of down lofts up to - 850+ = extremely high loft (only premium goose down reaches this) - Standard down is 600-700 fillpower - 800+ is the high-end benchmark - 850+ is reserved for serious premium products Why 850+ matters: - More loft per ounce = more warmth per gram - 850+ down traps more insulating air - Lighter weight for equivalent warmth - Lofts higher, fluffier feel RDS (Responsible Down Standard): - Third-party audited down sourcing - Animal welfare verified - Traceable supply chain - Industry-standard ethical certification Fill ratio: - 90/10 goose down (90% down clusters, 10% feathers) - High down % = more loft per ounce - Industry standard for premium down Ultra-Dry Down treatment (NON-PFAS): - Hydrophobic coating on individual down clusters - Down resists moisture absorption - Stays lofted when slightly damp - Per STS: "stays drier in damp conditions" - Non-PFAS = no forever-chemical concerns

The Ember uses four sustainability/quality certifications: 1. RDS Down (Responsible Down Standard): - Ethical sourcing of goose down - Animal welfare verified - Third-party audited 2. Bluesign® Approved Materials: - Chemical safety verified throughout production - Reduced environmental impact - Worker safety standards - Industry-leading textile certification 3. Recycled 10D Nylon Shell: - 10 denier = ultra-lightweight - Recycled content reduces new plastic - Non-PFAS DWR finish (no forever-chemical water repellent) - Repels light moisture + campground condensation 4. 10D Nylon Liner: - Lightweight inner fabric - "Pure comfort" feel per STS - Adds minimal weight Why all four together: - Premium + sustainable positioning - STS's most ethical down product line - Matches the request from conscious consumers

The Ember uses QuiltLock — STS's patented attachment system: What QuiltLock does: - Press studs on the sides of the quilt - Snap to the loops on a corresponding STS sleeping bag - Creates a single connected sleep system - Adds 5-15°F of warmth to the sleeping bag (depending on quilt temp rating) Use cases: - Add the 45°F QuiltLock to a 30°F sleeping bag = ~15°F boost - Add the 30°F QuiltLock to a 30°F sleeping bag = ~25°F boost - Modular warmth management Alternative use (per STS FAQ): - "The press studs on the side (usually used for sleeping mat attachment straps) can couple two Embers together" - Stack two Embers for ultra-cold conditions - Couples to itself as well as to sleeping bags Practical value: - Versatility — extend the warmth range of any compatible gear - Cost-effective compared to buying two separate products - STS proprietary system

Per STS, the Ember has a "drawcord footbox" — a closing mechanism at the foot end: What it does: - Cinch the foot opening closed - Traps warm air at the feet - Hoodless quilts otherwise let heat escape at the foot - Critical for actual warmth (the foot box is the main insulation weak point) How to use: - Cinch the drawcord snugly - Stops the quilt from sliding off the feet - Creates an enclosed foot chamber Cold-weather use (per STS FAQ): - "With the footbox drawcord cinched tightly, a sleeping mat with an R-Value of 3+ (and ideally a Reactor liner) you can get close to the freezing point" - Footbox = significant thermal boost Versus quilts WITHOUT footbox (true minimalist quilts): - Those let feet vent + extend warm - The Ember's footbox = smarter thermal management - Choose between venting (warm nights) and sealing (cold nights)

Quilts are fundamentally different from sleeping bags: Sleeping bag (mummy): - Full enclosure with hood - Insulation on the back side too - Heavy for warmth - Maximum warmth-to-weight Quilt (like Ember): - No hood (uses a hat instead) - No insulation on the back (rely on sleeping mat below for under-insulation) - Lighter (less material) - Better temperature regulation in warmth (vents easily) - More versatile (use alone, use with sleeping bag, etc.) Why quilts are popular: - Lighter than equivalent-warmth sleeping bags - Less constraining (open like a blanket) - Easier to ventilate (kick a leg out, push it aside) - Pack smaller Why quilts require a hat: - No hood = head loses heat fast - "Quilts do not have hoods, so make sure to wear an insulating hat" per STS FAQ - Bring a warm hat or balaclava Why quilts require a good sleeping mat: - The back is exposed to the cold ground via the mat - Mat's R-Value is critical (R-Value 3+ recommended for real backpacking use per STS FAQ) - Cold sleeper + cold mat = cold night despite warm quilt For cold weather (per STS FAQ): - Cinch footbox tight - Use a sleeping mat with R-Value 3+ - Add a Reactor liner for added warmth - Wear an insulating hat - Can reach "close to freezing point" with these measures

Shell: - 10D recycled nylon - Non-PFAS DWR finish - Lightweight - Breathable (allows moisture vapor to escape) Liner: - 10D nylon - Smooth against skin - "Pure comfort" feel per STS Construction: - Baffles hold the down in place (prevents clumping) - Differential cut (shell slightly larger than liner for proper loft) - Stitched-through design (lighter than baffled, slightly colder) - 90/10 goose down fill Stuff sack: - 100% nylon - Standard compression - 3-6.3 L compressed volume (very packable) Drawcord footbox: - Cinch cord for sealing the foot - Lightweight closure

The Ember Down Quilt is positioned as STS's premium quilt line for multi-season ultralight backpacking. Why it stands out: - 850+ fillpower is rare (only the best products) - RDS + Bluesign + Recycled = most ethical positioning - QuiltLock system = proprietary versatility - 2 temp ratings cover most backpacker needs Comparison to other STS quilt lines (if any): - Spark: warmer options / synthetic - Ember: this premium down line

Two temp options for different conditions: | Aspect | 45°F Quilt | 30°F Quilt | |---|---|---| | ISO Lower Rating | 7°C / 45°F | -1°C / 30°F | | Weight (Reg) | 423 g / 14.9 oz | 544 g / 19.2 oz | | Compressed Volume (Reg) | 3 L | 5.1 L | | Best For | 3-season backpacking | Shoulder season + winter | | Down Fill Weight | Lighter (less insulation) | Heavier (more insulation) | | Price (Reg) | $364 | $414 | | Price (Long) | $394 | $444 | Choose 45°F for: - Spring/summer/fall 3-season backpacking - Above-freezing conditions most of the time - Minimal weight priority Choose 30°F for: - Winter camping - Shoulder season with cold nights - Multi-season versatility Both use: - Same RDS-certified 850+ down - Same QuiltLock system - Same materials - Just different down fill weights

Backpacking (primary use): - Ultralight category - Bikepacking (fits handlebar bag/saddlebag) - Multi-season use - Compression-rated for tight packs Bivouac / Alpine: - Light enough for fast ascents - Cold enough for shoulder seasons Warmer Conditions: - Vent easily (kick leg out, push aside) - Multi-use (sleeping bag supplement or standalone) Cold Conditions (30°F version): - Cinch footbox - Add Reactor liner - Use R-3+ sleeping mat - Wear hat - Per STS FAQ: can reach "close to freezing point" Travel: - Compresses to 3-6 L - Fits carry-on luggage - Compatible with hostels + hotels Less suitable for: - Below-freezing overnight winter camping (use proper sleeping bag) - Hammock (need under-quilt for hammock bottom insulation)

Detour Collapsible Pot (STSA1213) / Pot 3L/5L: Not directly compatible (different product categories), but common backpacker kit. STS Sleeping Bags (Ascent, Alpine, Trek, etc.): Use QuiltLock to attach for thermal boost. STS Reactor Liner: Per STS FAQ, add a Reactor liner for extra warmth (close to freezing point). Detour Liner builds earlier in this session include Reactor Liners. STS Sleeping Mats (any with R-Value 3+): Critical for actual use. Per STS FAQ, R-Value 3+ is recommended. Air Sprung Cell mats work great. STS Airstream Pump Sack (STS951): Inflate mat, then put quilt on top. Insulating Hat: Per STS FAQ: "Quilts do not have hoods, so make sure to wear an insulating hat." Compression Dry Sack: Extra compression beyond the stuff sack for tighter pack fits. Sea to Summit DryLite Towel: For drying condensation. Bivy Sack: Optional waterproof shell for storm conditions.