Warm, Light and Compact; Perfect for high altitude mountaineering and arctic conditions.
Sea to Summit's Alpine series combines their most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality down.
The anatomically shaped and oversized foot-box can comfortably accommodate boots when necessary. Vertical baffles over the chest section ensure the down insulation cannot migrate or shift to the outside of the bag during sleep, creating cold spots. A side block baffle construction maintains the 60/40 fill ratio, keeping more down on the top of the bag for maximum insulation.
The water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down. The Free-Flow Zip system provides a half zip on the right side of the bag to provide freedom of movement for both arms as well as additional ventilation.
The full length, two-way left side zip provides easy access and extra ventilation options. The tightly sized and carefully panelled hood fits snugly around your head, allowing you to maintain maximum warmth with minimal adjustment. An oversized zipper draft tube is fitted with the lightest and stiffest anti-snag materials for effortless operation and to prevent heat loss through the zipper.
All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down.
Compression Sack Vol.
AP II - Regular
Up to 183cm
AP II - Long
Up to 198cm
AP III - Regular
Up to 183cm
AP III - Long
Up to 183cm
The EN13537 is a European standard for sleeping bags that provides three temperature levels to help guide you when choosing a bag.
Comfort: The temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you are female or consider yourself a cold sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for. We emphasise the Comfort temperature for our women’s specific sleeping bags.
Lower Limit: The temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for. We emphasise the Lower Limit temperature for all our unisex sleeping bags.
Extreme: This is a survival only rating for a standard woman. Between the lower limit and the extreme rating, a strong sensation of cold must be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only; we do not recommend you rely on this rating for normal use.
Designed for extreme cold and high-altitude conditions
Contoured mummy shape for efficient insulation
Expedition sizing for extra space and layered clothing
Vertical chest baffles prevent down migration and cold spots
Side block baffle with 60/40 fill ratio keeps more down on the top of the bag for maximum insulation
Anatomically shaped and oversized foot-box can accommodate boots
Free-Flow half right-side zip for freedom of movement and additional ventilation
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Waterproof/breathable NanoShell fabric protects against wind and moisture
Snug panelled hood maintains maximum warmth with minimal adjustment
Oversized draft tube with anti-snag materials prevents heat loss through the zipper
Oversized neck draft tube with a dual adjustment system for even cinching and maximum warmth
YKK #5 side zip has two sliders for easy access and extra ventilation