Sea to Summit Alpine Down Winter -20 Sleeping Bag

About This Item

Temp Rating

Below -5 Degrees

Insulation Type

Down

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.

Design and Details:

  • The technical hood, double draft tubes, expedition cut and 850+ fillpower RDS goose down combine to keep you warm in the coldest of climates
  • RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
  • Free-Flow Zip System: Full-length zipper with half-length zipper on opposite side for excellent temperature regulation
  • Roomy expedition mummy fit provides plenty of space for you, performance clothing and gear you don't want to freeze
  • Recycled 20D nylon shell material with non-PFAS DWR is light and durable
  • Hood and footbox have a highly water resistant, breathable fabric for extra moisture protection - ideal for bivies or snow caves
  • Highly breathable liner for enhanced comfort
  • Sea to Summit Guarantee is offered for the Lifetime of this product
  • Brand : Sea to Summit
  • Country of Origin : Imported
  • Web ID: 23S2SALPNDWN20FSLCSL
  • SKU: 25757180
SizeRegularLong
ShapeMummyMummy
Temperature -20-20
Best UseBackpackingBackpacking
Storage SackYesYes
Down rating850850
Max user height6 ft. 1 in.6 ft. 6 in.
Shoulder width63 in.66 in.
Hip width58 in.62 in.
Foot width48 in.52 in.
Compressed Volume12.6l14l
Compression Sack 26L 26l
Fill Weight35.3 oz. 40 oz.
Weight3 lbs. 3 oz.2 lbs. 8 oz.

REVIEWS

4.3

3 Reviews

Extremely Comfy But Cold

Amazingly comfortable, roomy, and light for backpacking. I used it in DNP last winter in -15 and froze. Had to have a belay parka, puffy pants, booties on in the bag.

Received incentive

Quality . . . Shelter For Sierra High Route

Traveling in the High Sierras during winter can be challenging, as weather conditions can shift from problematic to critical very quickly. To manage these risks, I treat every trip as a calculated journey rather than a gamble against nature. My core gear for winter Sierra High Route treks includes: 1. Sea to Summit Alpine -20F long sleeping bag 2. Inflatable 7R insulated sleeping pad 3. Two-person, 4-season tent The key to safety is transitioning quickly from hiking to a secure, dry shelter. On days when I am exposed to the elements or forced to set up camp in difficult conditions, the Sea to Summit Alpine bag is essential. Even when I am wet and cold, jumping into this bag provides immediate warmth and security. I have found this bag to be incredibly durable and reliable. Even after tears and split seams, the Sea to Summit repair team has restored it to excellent condition. I gladly carry the extra weight for the -20F rating because it serves as my security blanket in harsh environments. Along with my 4-season tent, this bag is my most important investment for safely exploring remote routes. Happy trails and stay safe, W1SPR

Received incentive

Sleeping Bag

Going to use in BC canada in August till October. It feels great I thought. will give futher review when I get back

Read All Reviews (3)