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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.
|Type||User Height||Compression Sack Vol.||Bag Weight||Fill Weight||Chest||Hip||Foot|
|AP II - Regular||Up to 183cm||20-6.5L||1340g||800g||160cm||142cm||131cm|
|AP II - Long||Up to 198cm||20-6.5L||1500g||920g||168cm||150cm||145cm|
|AP III - Regular||Up to 183cm||30-10L||1870g||1250g||160cm||142cm||131cm|
|AP III - Long||Up to 183cm||30-10L||2100g||1440g||168cm||150cm||145cm|
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.