TETON Sports

Altos 20ºF

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$131.39 $179.99 In stock

Oversized mummy bag with down fill.

  • Wider at shoulders
  • Longer at feet
  • Fitted for warmth

Enjoy all the warmth of a snug mummy bag fit but with none of the claustrophobia. Our cozy Altos mummy sleeping bags are innovatively measured above and beyond the industry standard to give you maximum mobility while maintaining the contoured fit for heat preservation. Roll over, stretch out— we’ve got you covered. Sleep easy. Shop Teton.

Additional features:

  • Perfect for backpackers
  • 3-piece ultra-puff hood
  • Soft, downproof nylon
  • Water-resistant shell
  • Interior storage pocket
  • Two-way anti-snag zippers
  • Full-length zipper draft tubes
  • Teton Lifetime Warranty
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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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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 (4.4 / 5 · 5 reviews)

Miles Z. ★★★★★

I’m 6'2" and usually my feet jam against the end of mummy bags, but the longer foot box finally gives me room to stretch out. Woke up warm all night without that tight, suffocating feeling around my chest.

Timothy ★★★★★

The shoulder width is the game changer for me—I can actually turn over at night without wrestling the fabric, and that extra foot room means my toes aren't crammed against the seam. The down fill kept me perfectly warm on a frosty 28-degree trip, and I slept like a log.

Penelope H. ★★★★★

The extra shoulder room is a game changer—I can actually shift positions without feeling like I'm wrapped in a straitjacket. Last weekend's 25-degree campout had me cozy all night, and the extra foot length meant my toes never touched the cold end.