Description
Cold is honest. It finds every gap in your kit. A sleeping bag cannot bluff its way through a sub-zero night. Either the fill loft recovers after compression, or you spend the night chasing warmth you already lost. The Windward carries 800 fill power down - the grade where warmth stops being a function of bulk and starts being a function of quality - inside a nylon iFlex shell finished with a durable water repellent treatment, so a damp tent floor is no longer a sentence.
Warmth should be adjustable, not fixed. Most bags hand you one answer. This one is built around adjustment: an insulated draft tube you cinch around your neck to lock warm air in, a trapezoidal foot box that keeps your feet in a shape they can actually occupy, and pad cords that hold the bag centred on your sleeping pad all night. The mummy cut gives you the snug envelope of an alpine bag, but the geometry is tuned so you can vent when you are warm instead of waking to unzip a decision you made hours earlier.
Comfort range 0 to minus 10 degrees Celsius. Packed weight you can carry without negotiating. Two sizes cover most adult sleepers: 176 x 130 cm for standard builds and 196 x 140 cm for taller frames and side sleepers who need shoulder room. It ships with a compression stuff sack for the trail and a loose mesh bag for breathable storage at home, which is how down survives a decade instead of three seasons.
Warmth is not a number on a specification sheet. It is the simple fact that you slept.
Key Features
- ✦ 800 fill power down insulation for maximum loft at minimum packed size
- ✦ Nylon iFlex downproof shell with durable water repellent finish
- ✦ Insulated adjustable draft tube that cinches around the neck
- ✦ Mummy cut with a trapezoidal foot box for genuine foot room
- ✦ Pad cords keep the bag centred on your sleeping pad instead of twisting off it
- ✦ Two sizes: 176 x 130 cm and 196 x 140 cm for standard and taller frames
- ✦ Includes a compression stuff sack and a breathable mesh storage sack
Technical Specifications
- Model: Wind Hard Twilight
- Category: Down mummy sleeping bag, cold weather
- Fill: 800 fill power down (duck down)
- Shell Fabric: Nylon iFlex, downproof, DWR finish
- Comfort Range: 0 C to -10 C
- Sizes: 176 x 130 cm / 196 x 140 cm
- Length Class: Lengthened - fits sleepers 1.8 to 2.0 m
- Shape: Mummy with insulated draft tube
- Foot Box: Trapezoidal, insulated
- Pad Attachment: Pad cords included
- Included: Compression stuff sack and mesh storage sack
- Season: Winter / three-season alpine
Where It Belongs
The Windward is built for people who sleep outside on purpose. Backpackers and bikepackers use it because 800 fill power down is the only way to carry a true winter rating at a volume that still fits a 40 litre pack. Mountaineers use it in huts and snow caves where the difference between a 0 C and a minus 5 C rating decides whether the next day happens. Car campers use it as the one piece of gear worth upgrading first, because a bad bag ruins every trip regardless of how good the rest of the kit is. It also solves the awkward middle - the shoulder-season trips where a summer bag leaves you cold at 4 a.m. and an expedition bag makes you sweat before midnight.
Frequently Asked Questions
Q: What does 800 fill power actually mean?
Fill power measures how much volume one ounce of down occupies. At 800, a given weight of down traps more air than 600 or 700 fill, so the same warmth fits in a smaller, lighter package. It is the metric that separates a bag you carry from a bag you tolerate.
Q: What temperature range is this bag rated for?
The stated comfort range is 0 C to minus 10 C. Read it as a comfort rating for a dressed adult sleeper, not a survival limit. Below minus 10 C add a liner or a second layer.
Q: Is it real down or synthetic?
Real down - 800 fill power duck down. Down outperforms synthetic insulation on warmth per gram and on longevity, provided it is stored uncompressed, which is why a mesh storage sack is included alongside the stuff sack.
Q: Will it fit me?
Two sizes are available. Choose 176 x 130 cm for sleepers up to roughly 1.8 m, and 196 x 140 cm for taller frames or anyone who moves a lot in their sleep and needs shoulder room.
Q: Can I use it on a sleeping pad without sliding off?
Yes. Pad cords are built in so you can tension the bag against your pad. That keeps you centred through the night instead of waking up sideways with the draft tube facing the tent wall.
Q: How do I care for it?
Store it loose in the mesh sack, never compressed. Wash rarely, with a down-specific detergent, and dry thoroughly on low heat with dryer balls to restore loft. Never dry clean down.
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