Mammoth 20 Degree Double Sleeping Bag


SKU: 109


- Car camping double sleeping bag
- Rated for cold temperatures
- Sturdy taffeta shell
- Soft-to-the-touch liner
- Mummy style hood
- Double-layer construction entire width and length of bag
- Full-width baffles and full-length zipper and shoulder draft tubes
- Sturdy anti-snag two-way zippers with metal pulls
- Unzip completely to make two camp comforters
- Lifetime Warranty


The Mammoth Double Sleeping Bag is the perfect two-person sleep system when you’re looking to enjoy the outdoors together. The soft-to-the-touch liner, draft tubes and mummy-style hood make it just right for snuggling. Simply bring one sleeping bag to eliminate the hassle of packing two separate sleeping bags and zipping them together.  It’s thoughtfully designed so you’ll never want to leave the comfort of your sleeping bag.

Specs and Sizing

Primary Features

Size: 94" x 62"
Pack Weight: 14 lbs.
Temperature Rating: +20˚F


Shell: Taffeta
Liner: 100% Brushed Poly Flannel
Filler: SuperLoft Elite Hollow Fiber

Storage & Conveniences

Size (packed-not compressed): 27" x 14" x 14"
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 4.50 out of 5 based on 6 customer ratings

    Based on 6 reviews

  • Sarah

    This sleeping bag is so warm and comfortable! It’s also very large so there is plenty of room for me and my husband, and even our baby when she wants to cuddle with us. Highly recommend!

  • Brooke Bowen

    I LOVE this sleeping bag. It is super comfortable, very soft, and so roomy! I was thinking about getting this as a gift for my other family members, and after my experience the decision is clear!

  • Oregon

    Grant (verified owner)

    Super comfortable bag and plenty of room for a tall guy like me. The only downside is the stuff sack is too tight, it takes a small army to pack this up.

  • WA


    This bag is super warm, I live full time in a poorly insulated. RV traveling the country. Have been trying to figure out what the extra hook and loop closure are supposed to be used for. I get that part of it let’s you have a bit more room around the shoulders. There are extra bits I’m not able to figure out and it’s not shown on the website. Help please🙂

  • Québec

    Yves Gaudreault

    Great sleeping bag very confortable and fluffy . but it’s impossible to put in its bag when it is out. A larger bag will be à great plus.

  • Illinois

    Jared Holbrook

    A fabulous bag. Can easily fit two adults or an adult and two children. We took it out of the sack and let if fluff up with air for a few hours and then returned it to the sack. We did this just to see what all the fuss was about concerning the difficulties people have returning the sleeping bag to it’s sack. Re-packing our bag took about 55 seconds. Don’t let the negative comments concerning this issue dissuade you from buying this sleeping bag. It’s perfect for car camping. You’d never consider this for backpacking but that’s not what it’s designed for anyway. It’s massive. They have videos on YouTube that go over all aspects of the item.
    Thanks Teton!

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