Item #: 332013617

The Atom’s ultra-light design and Marmot’s highest quality down 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. Updated with our Down Defender treatment offering an extra level of moisture protection for sleeping bags exposed to wet environments.

NOTE: Find in Store Inventory levels are continuously changing. Please contact store to confirm availability is as shown.


  • Filled and Finished in Rohnert Park, California
  • Certified 850+ Fill Power Goose Down
  • Down Defender to Improve Water-Resistance in Wet Conditions
  • EN Tested
  • Pertex© Microlight® Shell and Lining Fabric
  • Sewn-Through Baffles
  • Nautilus 6-Baffle Hood
  • Classic Trapezoidal Foot Box
  • Hood Draw Cord
  • Full Length Zipper
  • Insulated Draft Tube
  • Stretch Tricot Baffles at Hood and Foot Box


  • Weight: 680g
  • Bag Loft: 4
  • Fill Weight: 283g

Shipping Info:

  • Leaves the warehouse in 1-7 business days depending on order volume.
  • Items may be returned within 60 days of the order date to an Atmosphere retail store or an Atmosphere warehouse. Items must be returned unused/unworn and electronics unopened. See Online Return Policy and Return Instructions for more information.
  • Note: Shipping restrictions may apply based on location and product size.


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