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The Sea to Summit Alpine APIII Sleeping Bag is a high altitude sleeping bag for expeditions in arctic conditions. The APIII is rated down to -4 degrees Fahrenheit, packed full with 850+ fill ULTRA-DRY down, treated for water resistance. The contoured mummy shape wraps around your body with a neck collar and draft tube to prevent the cold from leaking inside. At 3 pounds, 9 ounces (regular), you won't mind carrying it on all of your winter adventures.
FEATURES of the Sea to Summit Alpine APIII Sleeping Bag
850+ Loft ULTRA-DRYDown 90° Down Cluster Premium European Goose Down
Security pocket located inside the bag is easily accessible
Side block baffle construction resulting in more down located in the top of the bag for maximum insulation
Oversized neckcollar and hood-seal
Contoured mummy fit and anatomical shaped foot box
Includes lightweight Ultra-Sil compression bag, mesh storage cell and laundry bag
Fill Weight (Regular):
Sea to Summit 3D Nano Shell, Sea to Summit ULTRA-DRY Down
Draw or Cinch Cord, Draft Collar, Water Resistant, Stuff Sack Included
Backpacking, Winter Camping, Basecamp and Expedition, Mountaineering and Alpine, Travel
Exact Temperature Rating:
-4 Degrees Fahrenheit
Sleeping Bag Shape:
Max User Height (Regular):
Bag Weight (Regular):
3 lbs, 8 oz
850+ Loft ULTRA-DRY Down
-50 - -1 Degrees Fahrenheit
3D Nano Shell
3D Nano Shell is a protective layer between an outdoor enviroment and the soft, fluffy down of a Sea to Summit sleeping bag. The NanoShell fabric face is windproof and water repellent, while the 3D barrier of non-woven silicone encapsulated layer allows vapors and condensation to pass through. This combination allows the bag to breath from the inside out, while external wind or water can't get in. Simply put, it'll protect the down so the down can keep you warm.
Sea to Summit ULTRA-DRY Down
ULTRA-DRY Down is a treated insulator for Sea to Summit sleeping bags. ULTRA-DRY treated down repels moisture, so when your environment is damp, your gear stands a much better chance. The down will retain its loft, dry faster and is even anti-bacterial and anti-microbial, improving their life span. When conditions are bad, your bag doesn't have to be.