ALTOS -10 Ultralight Down Mummy Bag



Out of stock


- RSD fill (Responsibly Sourced Down)
- Lightweight
- Extra room in the footbox
- Anti-snag zippers
- Sturdy ripstop shell and soft liner
- Two sewn-in hanging loops for storage or to air dry
- Drawstring compression sack
- Lifetime Warranty


Step up your comfort. The ALTOS Ultralight Down Sleeping Bags are designed with you in mind. The water-resistant down is perfectly distributed throughout the entire bag to keep you warm and comfortable. These bags provide more room for your shoulders, legs and feet.

Step up your features. The ALTOS Sleeping Bags are compact when carrying them, but so lofty when it’s time for bed. The nylon shell saves on space and weight. It’s a backpacker’s ultimate solution.

Step up your value. The ALTOS Sleeping Bags are not only warm, comfortable and easy to pack, they also have features you don’t usually see at this price, like sustainable down, a vaulted footbox, zipper draft tubes and a 3-piece hood. Get the ALTOS Ultralight Sleeping Bag and step up your adventure.

Specs and Sizing

Primary Features

Size: 84" x 32" (at the shoulders) x 17" (at the foot)
Pack Weight: 4.2 lbs.
Temperature Rating: -10˚F


Shell: 20D Ripstop
Liner: 20D Nylon
Filler: MTN-DRY Hydrophobic Down

Storage & Conveniences

Size (packed-not compressed): 16.5" x 10" x 10"
Storage: Oxford Stuff Sack with Drawstring Closure

Lifetime Warranty

TETON Sports has one of the best product guarantees in the business, made possible by our low defect rate and extra-mile customer service policy.

Customer Reviews

  • Rated 5.00 out of 5 based on 2 customer ratings

    Based on 2 reviews

  • Shannon Koch

    It’s not called the mummy bag for nothing. You will literally sleep cozy like a mummy!

  • Lauren

    This is the best sleeping bag I have ever owned. I took my mummy bag on an overnight backpacking trip in the high Uintas where temps dropped to around 48-50 degrees. As someone who is always cold, I was a little nervous about staying comfortable overnight, but this bag was so much more than just comfortable. This sleeping bag kept me cozy and warm all night long!

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