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  • Citing this Editors’ Choice winner, the April 2011 issue of Backpacker claimed, “In the quest for maximum warmth at minimum weight, we have a new standard setter”
  • Filled with certified, super-lofty, ultralight, 900-fill-power goose down (the largest down cluster with the lowest trace of feather) for an unsurpassed warmth-to weight ratio
  • Flow Gate Construction lets you manually shift the down to preferred locations—move it to cold spots, customizing warmth to your personal sleep preference
  • Pertex® Quantum nylon ripstop shell is lightweight and durable, and offers silky softness that enhances the insulation's loft
  • Shell is treated with a Durable Water Repellent finish that causes moisture to bead up and roll off
  • Hood drawcord and insulated collar envelops your head and shoulders in warmth; down gasket face muff lets you cinch the hood snug without it digging into your face
  • Vertical baffles prevent cold spots by keeping the goose down fully lofted and in place
  • Down-insulated draft tube backs the 2-way, full-length zipper to keep the cold out
  • Wrap-around footbox construction reduces down compression; Flow design with the classic trapezoidal foot box shape lets feet move freely and keeps down lofted for warmth
  • Zipper guard runs the entire length of the draft tube to prevent fabric from getting caught in zipper
  • Marmot Plasma sleeping bag features an ultralight stuff sack and storage bag
  • European Norm (EN) is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags


View all Marmot Men's Sleeping Bags

REI membership


Best Use Backpacking
EN Lower Limit 18 degrees Fahrenheit
EN Comfort 29 degrees Fahrenheit
Temperature Rating (F) 18 degrees Fahrenheit
Temperature Rating (C) -7.7 degrees Celsius
Weight 1 lbs. 15 oz. / 1 lbs. 14 oz.
Shell Nylon
Insulation Type Down
Fill 900-fill goose down
Fill Weight 19.4 / 17.6 ounces
Lining Nylon
Sleeping Bag Shape Mummy
Fits Up To (in.) 78 / 72 inches
Shoulder Girth (in.) 62 / 60 inches
Hip Girth (in.) 60 / 58 inches
Stuff Sack Size 7.5 x 15 inches
Stuff Sack Volume 11 liter
Gender Unisex
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