Sea to Summit Alpine APIII Sleeping Bag

Sea to Summit
Alpine APIII Sleeping Bag

Sea to Summit Alpine APIII Sleeping Bag is rated 5.0 out of 5 by 1.
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5 Star Rating
5.0
$533.34   $698.95
24% off
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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.

Products on Sale are Discontinued Styles or Colors.

Product Description
Item No.   10243748
 

FEATURES of the Sea to Summit Alpine APIII Sleeping Bag

  • 3D NanoShell
  • 850+ Loft ULTRA-DRYDown 90/10 Down Cluster Premium RDS-certified 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 neck collar and hood-seal
  • Contoured mummy fit and anatomical shaped foot box
  • Includes lightweight Ultra-Sil compression bag, mesh storage cell and laundry bag

Product Specifications
Gender: Mens
Features: Draw or Cinch Cord, Draft Collar, Water-resistant, Stuff Sack Included
Best Use: Basecamp and Expedition, Winter Camping, Backpacking, Mountaineering and Alpine, Travel
Exact Temperature Rating: -4 Degrees Fahrenheit
Sleeping Bag Shape: Mummy
Fill Details: 850+ Loft ULTRA-DRY Down
Zipper Side: Left
Fill Weight (Regular): 32.8 oz
Weight (Regular): 56 oz
Product Technology: Sea to Summit 3D Nano Shell, Sea to Summit ULTRA-DRY Down
Insulation: Down
Temperature Rating: -50 - -1 Degrees Fahrenheit
Max User Height (Regular): 72 in.
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3D Nano Shell

3D Nano Shell
3D Nano Shell is a protective layer between an outdoor enviroment which prevents condensation and external moisture affecting 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 moisture vapors and condensation to pass through. If this condenses on the inside of the shell, the condensation (and any external moisture) cannot pass back into the down. Simply put, it'll protect the down so the down can keep you warm.

Check Out All 3-D Nano Shell Products >

Sea to Summit ULTRA-DRY Down

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.

Check Out All ULTRA-DRY Down Products >

Product Reviews
Rated 5 out of 5 by from Truly a Quality Product I have owned many sleeping bags over the years and this is a favorite. It's comfortable, has good loft and is well constructed. Also, there is not a lot of extra room to heat. I'm 5'6" and 150. A larger person may be cramped but it's perfect for me. Wearing just base layer, I am warm and comfortable with temps in the mid 20s and thirties. I'm not happy with all my Sea to Summit purchases but this one is a winner. [This review was collected as part of a promotion.]
Date published: 2018-11-25
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Is this rated for -4 or -50, it says both on the description.... ?

Asked by: Julia C
Hi Julia C, thanks for the question! After looking at this bag, it has an extreme limit of -4 degrees, I'll make sure we get that corrected as soon as possible. I hope this helps!
Answered by: Marty Moose
Date published: 2020-08-05
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Size Guide