Pack a slice of summer along on your cold-weather trip.

Though an early frost is setting in outside of your shelter, the Marmot Never Summer MemBrain Sleeping Bag will have you dreaming of the hot sun and sandy beaches. Stuffed with oodles of ultra-warm, lightweight 600-fill goose down and wrapped in Marmot's waterproof breathable MemBrain 2L fabric, the Never Summer keeps the cold at bay while simultaneously protecting your down insulation from condensation and spindrift.

  • EN comfort rated at 20.5° F for cozy three-season use; lower limit rated at 8° F for occasional use during winter outings
  • MemBrain 2L waterproof fabric helps shelter the down insulation from external condensation, snow, and water
  • MemBrain 2L fabric is also highly breathable so evaporating sweat won't condense inside the bag and cause the down insulation to clump
  • The 600-fill goose down compresses well, rebounds nicely after repeated compression, and features a high warmth-to-weight ratio
  • Down-filled draft collar, zipper-length draft tube, and ground-level seams help prevent leaks and improve warmth retention
  • Stretch tricot baffles allow the bag to be stuffed and unstuffed without creating a tear in the baffle material
  • Classic trapezoidal foot box gives your toes plenty of room to wiggle; heater-pocket in foot box lets you pack in some additional warmth
  • Stuff and storage sacks included

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Marmot Never Summer MemBrain Sleeping Bag: 0 Degree Down

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Here's what others have to say...

5 5

It works

I have used this bag on Mt. Elbrus during a winter accent, the weather did get down to -10 for a night at camp 2 and I was pretty comfortable, mind you I had a liner and a bivy sack inside a 4 season tent with an insulated floor with an R value of around 15, but I was able to sleep comfortably. If the weather was any colder, I probably would not have made it for the night I was on the razors edge. I think the most optimal weather for this pack is 20-10 degrees. This bag breaths really well and retains heat, which is the most enduring quality. This bag packs down to about a #3 or #4 soccer ball, so it does not take up a lot of space for a winter bag. With most winter bags it does have a little weight too it, but for winter enthusiasm I think this has been my experience most of the time. This bag is a 600 down fill, and in the future I think I would get a 700-800 fill bag because there are more options out there that are affordable. Bottom line, the bag worked and kept me toasty. This bag is priced right and I would recommend it for anyone doing any moderate winter activities.