Highlights
Best Use: Mountaineering
Performance: Cold Climate
Weight: 3lb 10oz | 1645g
Compressed Volume: 14L
Lower Temp Rating: -20°F | -29°C
Performance
- Ultralight
- Lightweight
- Midweight
- Ultra Compact
- Compact
- Midsize
- Warm
- Cold
- Extreme Cold
About The Product
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 non-PFAS Ultra-Dry Goose Down delivers maximum warmth retention.
Product Features
Shipping & Returns
We use climate-neutral shipping:
DHL GoGreen for orders to Germany, Austria, France, Italy and Czech Republic and
GLS Klima Protect for orders to Belgium, Denmark, the Netherlands, Luxembourg, Sweden, Switzerand and Norway.
All orders are usually shipped within 48 hours.
Delivery time can take up to 3 working days Germany-wide, 4 working days for orders to AT, BE, CZ, DK, FR, IT, LU, NL & SE and 6 working days for orders to CH & NO and depends on the shipping service provider.
Shipping cost:
- Germany: For orders with a value below 100€ we charge a shipping fee of 4,95€. We do not charge shipping fees for orders with a value over 100€.
- France, Italy, Belgium & Netherlands: For orders with a value below 100€ we charge a shipping fee of 9,99€. We do not charge shipping fees for orders with a value over 100€.
- Luxembourg: We charge a shipping fee of 9,99€ for all orders.
- Austria & Czech Republic: We charge a shipping fee of 14,99€ for all orders.
- Denmark: We charge a shipping fee of 75 DKK for all orders.
- Norway: We charge a shipping fee of 455 NOK for all orders.
- Sweden: We charge a shipping fee of 219 SEK for all orders.
- Switzerland: We charge a shipping fee of 29 CHF for all orders.
All orders can be returned within 14 days of purchase. However, for the sake of the environment, please make sure to keep returns as low as possible.
Find Locally
Sea to Summit tests its sleeping bags for their temperature rating using the ISO 23537 test protocol. This test gives two key ratings: Lower Limit and Comfort Rating.
Lower Limit: The lowest temperature at which a man should stay warm.
Comfort Rating: The lowest temperature at which a woman should stay warm.
Sea to Summit Women’s-specific sleeping bags are listed using the Comfort Rating. Unisex bags are listed using the Lower Rating. For example, if the bag is rated at Lower Limit of 14°F | -10°C and Comfort rating of 27°F | -3°C, it should keep a woman warm down to 27°F | -3°C and a man warm down to 14°F | -10°C, if they are wearing warm clothes and using a good sleeping pad.
Remember: These ratings are just guidelines. Movement, weather, and your gear setup can all affect how warm you actually stay.
Pro Tip: Think of your sleeping bag, pad, and liner as a system. If you expect 28°F | -2°C weather, choose a sleeping bag rated for 23°F | -5°C, use a sleeping pad with an R-Value of 3 or more, and add a liner for extra warmth.

Alpine Down Sleeping Bag -29°C / Long

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 non-PFAS Ultra-Dry Goose Down delivers maximum warmth retention.
Technical Features

850+ Loft Ultra-Dry Down

Quiltlock System

Responsible Down Standard (RDS)

Non-PFAS

Free Flow Zip
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 |
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