TETON Sports

Bridger Mammoth 20°F

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$132.29 $209.99 In stock

Oversized canvas sleeping bag with flannel lining and a cinchable mummy hood.

  • Our biggest bag
  • Ultra durable
  • Our warmest bag

Experience ultimate comfort with the Bridger Sleeping Bag, our largest and most spacious sleeping bag. Significantly wider than standard rectangle bags, this oversized durable sleeping bag with flannel lining and a cinchable mummy hood is designed for those who crave extra room. The ultra-tough canvas exterior retains heat efficiently, while the soft flannel lining ensures you feel warm all night long. Perfect for a range of weather conditions from -35˚F to +20˚F and available in multiple sizes: Li'l Junior (kids), Regular, or Mammoth Double (two-person), choose the temperature rating and size that matches your family camping adventure. Whether you’re facing warm summer nights or frigid winter conditions, this is our warmest bag yet. Sleep easy. Shop Teton.

*The ratings we use are Survival Temperature Ratings, this is the coldest temperature the sleeping bag is designed to keep you alive in, but it doesn’t guarantee comfort. At the lowest point, you might be shivering or experience discomfort. For comfort ratings, we suggest adding 20-30 degrees from the listed rating.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Kevin ★★★★★

I’ve been sleeping in this bag every night for a week and the cinchable mummy hood is a game changer—I can finally block out drafty cabin air without burying my head. Canvas shell feels bombproof too, like it’ll outlast my tent. Honestly, for 20-degree nights it’s been plenty warm and roomy enough t

Scarlett J. ★★★★★

The flannel lining makes a huge difference—I actually look forward to crawling in after a cold hike, and the cinchable hood seals out drafts better than any bag I've owned. It's bulky, sure, but that's the price of feeling like you're wrapped in a giant blanket.

Abigail ★★★★★

I’ve been using this bag on freezing car-camping trips and the flannel lining makes a huge difference—no more icy shock when you climb in. The canvas feels tough enough to drag around camp without worrying about tears, and I slept warm right down to the low 20s.