Antelope StormShield
Mummy (w/ full collar)
- Weight, 6′0″
- 2 lb 10 oz1190 g
- Insulation
- 850+goose down
- Shell
- StormShieldStormShield
How warm is it, really?
- EN/ISO extreme
- -43°F
- EN/ISO limit
- -2°F
- EN/ISO comfort
- 10°F
- WM rating
- 5°F
Our rating usually falls between the EN/ISO “limit” and “comfort” figures, and assumes a well-insulated pad (about R 5.0 in the cold), dry base layers and socks. How we rate our bags.
Antelope StormShield – Weather-Resistant Alpine Sleeping Bag for Cold, Wet, and Windy Conditions
The Antelope StormShield is a weather-resistant alpine sleeping bag designed to handle freezing temps, snow, and howling wind without adding unnecessary weight. With a 5°F rating and weighing only 2 lb 10 oz, it’s built for mountaineers, ski tourers, and backpackers facing harsh, unpredictable environments.
Filled with 26 ounces of premium 850+ fill power goose down, the Antelope delivers serious warmth without bulk. Its StormShield™ shell fabric—a windproof, water-resistant microfiber—adds critical protection against moisture and spindrift while remaining breathable. Whether you’re bivying above treeline or hunkered down during a storm, this bag keeps insulation dry and lofted.
The slightly wider cut offers comfort for side sleepers or those wearing layers, while maintaining thermal efficiency. A full down-filled collar and insulated draft tube seal in warmth, and the contoured hood adjusts easily for a secure, heat-trapping fit. The full-length YKK zipper allows for easy entry and ventilation.
This bag thrives in cold, wet, and windy conditions—perfect for alpine climbs, early spring traverses, or exposed ridgelines. It’s also ideal for high-altitude camps where space, weight, and warmth all matter.
Handmade in the USA, the Antelope StormShield reflects Western Mountaineering’s commitment to quality, ethical sourcing, and performance-driven design. When your adventure leads to snow-covered benches in the Sierra or icy ledges in the Rockies, trust the Antelope to deliver lasting warmth, packability, and protection.
For adventurers who don’t wait for perfect forecasts, this is your reliable, all-season alpine companion.
Features
- Filled with 850+ Fill Power ethically-sourced premium goose down
- Continuous baffles allow you to shift down for more insulation in colder weather
- Weather-resistant StormShield shell protects against extreme wind and moisture, while maximizing inner breathability
- StormShield-lined Insulated Draft Tube blocks cold air and keeps the torso better insulated
- Three-Dimensional Insulated Draft Collar provides barrier against heat loss
- Full-length #5 YKK zipper provides a smooth, easy unzipping experience while being durable in cold weather
- Comes with ultralight stuff sack and breathable mesh storage bag
- 2 lb 10 oz. Total Weight
Specifications
- Shape
- Mummy (w/ full collar)
- Temp Rating
- 5°F
- Fill
- 850+ Power Goose Down
- Color
- Neon
- Country of Origin
- USA
- Fabric
- StormShield
- Loft
- 7" in
| Length | Inside Girthshoulder / hip / foot | Fill Weight | Total Weight | Stuff Size |
|---|---|---|---|---|
| 5'6" | 62"/53"/39" | 24 oz | 2 lb 8 oz | 9"x18" L |
| 6'0" | 62"/53"/39" | 26 oz | 2 lb 10 oz | 9"x18" L |
| 6'6" | 63"/54"/39" | 28 oz | 2 lb 12 oz | 9"x18" L |
