TETON Sports

Altos Down 0°F

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$240.89 $329.99 In stock

Category: Sleeping Bags

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
Before you pay

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When it ships

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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 (4.6 / 5 · 5 reviews)

Jason R. ★★★★★

The shoulder room is a game changer—I’m a side sleeper and usually feel trapped in mummies, but I rolled over easily all night. Down fill kept me cozy at 10°F with just a base layer on.

Ruby ★★★★★

The extra shoulder room is a game-changer—I can actually roll onto my side without fighting the fabric, and the longer foot box means my toes stay warm all night. Used it in 18°F weather and woke up sweating, which says a lot for a bag this lightweight.

James ★★★★★

I was worried a mummy bag would feel like a coffin, but the extra room at the shoulders and feet makes all the difference—I can actually shift positions without fighting the fabric. Took it down to a frosty 20°F night and stayed perfectly warm with just a base layer, so I trust the 0° rating complet

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