Alpine Down Sleeping Bag (-29°C)
BEST USE: Mountaineering
PERFORMANCE: Cold Climate
WEIGHT: 3lb 3oz | 1459g
COMPRESSED VOLUME: 12.6L
LOWER TEMP RATING: -20°F | -29°C
- RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
- Recycled 20D nylon shell material with PFAS-free DWR is light and durable
- Roomy expedition mummy fit provides plenty of space for you, performance clothing and gear you don't want to freeze
Gear up for your next high altitude or colder latitude adventure with the Alpine Down Sleeping Bag. The expedition mummy fit provides ample space for winter gear, while the modified Free-Flow Zip system provides ventilation and versatility. Complex construction throughout and 850+ fillpower, RDS-certified PFAS-free Ultra-Dry Goose Down delivers maximum warmth retention.

DESCRIPTION
Gear up for your next high altitude or colder latitude adventure with the Alpine Down Sleeping Bag. The expedition mummy fit provides ample space for winter gear, while the modified Free-Flow Zip system provides ventilation and versatility. Complex construction throughout and 850+ fillpower, RDS-certified PFC-free Ultra-Dry Goose Down delivers maximum warmth retention.
Features
- RDS-certified, 850+ fillpower goose down with a non-PFC Ultra-Dry Down treatment for maximum thermal performance
- Recycled 20D nylon shell material with PFC-free DWR is light and durable
- Roomy expedition mummy fit provides plenty of space for you, performance clothing and gear you don't want to freeze
- Highly breathable liner for enhanced comfort
- Free-Flow Zip System: Full-length zipper with half-length zipper on opposite side for excellent temperature regulation
- Technical hood and footbox, efficient mummy shape and generous draft tubes on the zippers maximize warmth retention
- Sea to Summit Guarantee is offered for the Lifetime of this product
TECH SPECS
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Best UseMountaineering
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Comes With40D recycled, bluesign APPROVED nylon compression bag
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InsulationRDS certified, 850+ non-PFAS Ultra-Dry Down
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ShapeExpedition Mummy
| -29°C Regular | -29°C Long | |
|---|---|---|
| Bag Weight | 1459g | 1645g |
| Compressed Volume | 12.6 L | 14 L |
| Compression Sack | 26 L | 26 L |
| Fill Weight | 1000 g | 1135 g |
| Fits Up To Height | 185 cm | 198 cm |
| Temperature Rating (ISO Lower Limit) | -29°C | -29°C |
| Women's Temp Rating (ISO Comfort) | -19°C | -19°C |
TECHNICAL FEATURES
Frequently Asked questions
Can two Alpines be zipped together?
No - the Alpine is only available as a left-zipper version
Can the Alpine be used in summer?
An Alpine is really too heavy and bulky to be practical for summer use (we're skeptical of the term "4-season bag")
Is the Alpine available in a size Small?
It isn't. Because of the relatively small numbers produced, we have to stay with the two most popular sizes, Regular and Large