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Sleeping Bags & Pads


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Marmot Atom 40 Sleeping Bag (850 + Down)

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Marmot Atom 40 Sleeping Bag (850 + Down)

The Marmot Atom's ultra-light design and the highest quality down available have given it cult status among alpinists as a bivvy bag on extreme climbs, but its comfortable, silky fabric make it a great bag for warm-weather bivvies on casual summer road trips as well. The Atom also makes a great inner bag for bag layering. Turn any 20 degree bag into a 0 with the Atom. The Atom packs down to the size of a softball and weighs only 1 lb 5 oz.

  • Certified 850+ Fill Goose Down The Best Weight to Warmth Down in the Market; Independently Tested and Certified by International Down and Feather Laboratory in Salt Lake City, Utah. Retested at Fill Time in Santa Rosa to Ensure 850+ Fill Power Every Time. If the Down Does Not Meet Our In-House Test, We Send It Back
  • Classic Trapezoidal Foot Box For More Foot Room
  • Full-length Zipper
  • Hood Draw Cord Positioned for Easy Access
  • Insulated Draft Tube Eliminates Cold Leaks Through the Zipper
  • Sewn-Through Baffles Makes the Overall Weight Lighter
  • Stuff and Storage Sack Included Store and Pack Just Like Your Sleeping Bag
  • Velcro®-free Face Muff Keeps the Drawcord and Zipper Away from Your Face
  • Zipper Guards Help Repel Biting Zipper Coils

Read Reviews on: Marmot Atom 40 Sleeping Bag (850 + Down)




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Height: 6 ft; 6 ft 6 in
Body Material: LightForce N-120R DWR
Insulation: 850+ Fill Goose Down
Temperature Rating: 40°
Style: Mummy
Weight: 1 lb 5 oz/ 595 g
Fill Weight: 8; 10 oz
Shoulder Girth: 62; 64 in