Stretch-knit blend of TENCEL Lyocell + Polyester feels soft against skin — no clammy synthetics.

TENCEL fibers absorb moisture and release it, keeping you dry through warm nights.

HeiQ Fresh bio-based odour control neutralises smells — extends time between washes.

Any extra layer traps insulating air. Adds a few degrees of warmth to any bag or quilt.

Sleep sheet wherever you travel — hostels, hotels, AirBnBs, guest beds.

Stretch-knit + rectangular cut = moves with you during sleep, no binding.

TENCEL Lyocell is a regenerated cellulose fiber made from sustainably-sourced wood pulp (typically eucalyptus). It's been embraced by outdoor and bedding brands for its unique properties: Why TENCEL is special: - Moisture management — absorbs 50% more moisture than cotton, releases it quickly. Keeps skin dry during warm nights or sweaty sleepers. - Soft hand-feel — often described as softer than cotton or silk. Excellent next-to-skin. - Thermoregulating — feels cool in warm weather, warm in cool weather (like cotton). - Naturally antibacterial — resists odor better than synthetics alone. - Sustainable — closed-loop manufacturing process recycles 99% of the solvents used. In the Comfort Blend liner: - 30% TENCEL Lyocell + 70% Polyester = softness + durability - TENCEL gives the moisture-wicking and feel - Polyester gives structure, quick-dry, and shape retention - Stretch-knit construction lets the fabric move with body Vs pure cotton liners: TENCEL absorbs more moisture, dries faster, and resists bacteria. Vs polyester alone: TENCEL is softer and less clammy. Vs merino wool: TENCEL is cooler (better for warm climates), easier to wash, lower-maintenance.

HeiQ Fresh is a bio-based odour control technology used on premium performance fabrics: How it works: - The liner is impregnated with bio-based amino sugar polymers - These polymers absorb and neutralize odor molecules (body oils, sweat, etc.) - When you wash the liner, the trapped odor compounds are released down the drain - Polymer is ready for the next use — indefinitely (it's not consumed) Why this matters for a liner: - A liner is worn next to skin for many consecutive nights (travel, hostels, trekking) - Standard synthetics smell after 2-3 wears - HeiQ-treated fabrics stay fresh through multi-week trips - Reduces washing frequency = water savings (important for long-distance travel) Renewability: - Each wash refreshes the polymer - Eventually (after many washes) the effect diminishes - STS doesn't specify the cycle life, but typically 50+ washes Compatibility: HeiQ is bonded to fibers during finishing — won't wash off in normal washing. Comparison: similar to Polygiene (used in some wool/synthetic blends) or FreshPlus — all "trap odor until washed" technology.

The Comfort Blend fabric is a knit (vs woven), with mechanical stretch built in: Why knit (vs woven): - Knits have loops that stretch and recover naturally - More comfortable against skin (follows body contours) - Better moisture transfer (capillary action in knit structure) - Less prone to "stiff" feel than woven alternatives Stretch benefits: - Moves with you during sleep (no pulling/tugging) - Accommodates tossing/turning - Doesn't bind at knees/hips - More comfortable in any sleeping position Care: the stretch allows recovery from bunching — if it twists in the night, shake it out and it self-corrects.

The Comfort Blend comes in two formats: Rectangular (185 × 80 cm): - Standard liner length — fits most adults to ~185 cm / 6'1" - Sits inside mummy or rectangular sleeping bags - Ideal for typical backpacking/travel sleep systems Rectangular with Pillow Sleeve (225 × 80 cm): - Adds 40 cm / 16 in at the head for the pillow sleeve - Standard pillow fits into the sleeve — stays in place all night - Better for restless sleepers (pillow doesn't migrate) - Longer length works with quilts and blankets Rectangular shape (vs mummy-shaped liners): - More freedom of movement - Better for restless sleepers - Adds slightly more weight (extra fabric) - Easier to use as a stand-alone sleep sheet (hostels, travel)

The Comfort Blend is rated for all climates (Warm / Cold / Extreme Cold) — but with caveats: Warm climates: - Ideal. TENCEL wicks moisture, dries fast. - Acts as a sleep sheet when no bag is needed - Keeps you covered and protected (hostels, dorms) Cold climates: - Adds ~3-5°F of warmth (any layer traps air) - Use inside a sleeping bag for thermal boost - Or use alone with blankets/quilt at lower elevations Extreme cold: - Limited warming effect (3-5°F maximum) - For serious cold, pair with Reactor or Thermolite liner for max thermal boost - Or use as a hygiene layer inside a winter bag Why this matters: a liner extends the usable range of your sleeping bag. A 40°F bag with a Comfort Blend liner becomes effective to 35-37°F. Doubles as a summer sleep sheet.

Travel (primary use): - Hostels, hotels, AirBnBs, guesthouses — the Comfort Blend with Pillow Sleeve is a hygienic sleep sheet - Reduces questionable bedding exposure - Light enough for long-term luggage Camping: - Keeps sleeping bag clean (inside liner) - Adds warmth in shoulder seasons - Doubles as a sleep sheet in warm weather (no bag needed) Hygiene: - Especially useful for shared/cabin sleeping - Allergy-sensitive sleepers (creates a barrier between you and the bag) - Long-term host travellers Backcountry: - NOT recommended for serious backpacking (Breeze or Reactor is lighter) - Suitable for car camping, basecamp, light backcountry Not backpacking-friendly: STS FAQ confirms "Probably not... heavier and bulkier than most backpackers would want — a Breeze or Reactor would be better choices."

The Comfort Blend sits between the ultralight Breeze and the warmth-focused Reactor: | Aspect | Comfort Blend | Breeze | |---|---|---| | Material | 70% Polyester + 30% TENCEL | COOLMAX EcoMade + TENCEL (different blend) | | Weight (Rectangular) | 290 g / 10.2 oz | ~140 g (ultralight) | | Feel | Softer (TENCEL-dominant blend) | Cooler (COOLMAX focus) | | Best Use | Travel, camping, daily use | Hot-weather, ultralight backpacking | | Climate | Warm / Cold / Extreme Cold | Warm primarily | | Stretch | Stretch-knit | Less stretch | | Odour Control | HeiQ Fresh | Yes (similar treatment) | Choose Comfort Blend for: travel, daily use, softness, broader climate range. Heavier but more comfortable and versatile. Choose Breeze for: ultralight backpacking, hot-weather trekking, weight savings. Less soft, less versatile. Both use TENCEL + synthetic blends for moisture management.

Other STS liners focus on thermal boost: Reactor (STS054101 etc.): - Adds 8-15°F of warmth (vs ~3-5°F for Comfort Blend) - Hollow-core fiber construction - Heavier (450-650 g) — bad for weight-conscious backpackers - Best for: cold-weather camping where every degree matters Thermolite (STS054201 etc.): - Adds 5-10°F of warmth - Mid-weight - Best for: shoulder-season backpacking needing thermal boost Comfort Blend: - Adds 3-5°F of warmth - Lighter than Reactor but warmer than Breeze - Best for: travel-focused use where softness and hygiene matter more than thermal boost All STS liners span the same temperature range (per STS docs) — it's the warming effect that varies: | Liner | Adds Warmth | Best Use | |---|---|---| | Breeze | ~2-3°F | Hot climates, ultralight | | Comfort Blend | ~3-5°F | Travel, daily use | | Thermolite | ~5-10°F | Cool-weather backpacking | | Reactor | ~8-15°F | Cold-weather camping | Source: STS product line documentation. Exact numbers vary by bag + sleep system.

The rectangular shape works with: - Rectangular sleeping bags — primary fit - Quilts — works as inside layer - Mummy bags — fits inside, slight width excess (doesn't bind) - Blankets — acts as bottom sheet Not compatible with: - Hooded sleeping bags (Comfort Blend doesn't have hood) - Sleeping bags narrower than 80 cm (width matches) Pairing tips: - Use inside a bag for thermal boost - Use alone in warm weather as a sleep sheet - Pair with a pillow for travel — fills the gap between luggage pillows and home comfort

Aeros Pillows (STS000430 / STS045306): Premium pillows that pair with all STS liners. Use inside the pillow sleeve for complete sleep setup. Ether Light XT Pillow (STS...): Similar premium pillow options. Foil / inflatable mat: pair liner with any STS sleeping mat for complete sleep system. STS Stuff Sacks: The Comfort Blend's packed size (7 × 3 × 5 in) fits all STS dry sacks. For travel, consider the Lightweight Dry Sack (3L) to keep the liner separate in luggage.