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Alpinist Bivy

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Give your sleeping bag its own hardshell jacket.

Your kit is ultralight, you move fast, and you have to be ready to sleep anywhere from soggy snow caves to drippy granite slabs. Sounds like you're the perfect candidate for the Marmot Alpinist Bivy. Weighing in at just 14-ounces and packing down to about the size of a water bottle, this bivy offers serious light-and-fast advantages over your tent. Marmot's own waterproof breathable fabric fends off foul weather without leaving you sweating underneath when the skies clear. All you really need is your sleeping bag, a bivy, and a flat place to rest your weary bones.


  • Marmot's proprietary MemBrain waterproof breathable fabric offers supreme weatherproofing in a 2.5-layer package that does away with heavy 3-layer constructions and internal linings
  • Despite its feathery-light weight, MemBrain is highly abrasion resistant
  • Fully taped seams offer additional protection against precipitation and wetness
  • The 40D nylon floor protects against abrasive sleeping surfaces and offers high-end water-resistance
  • Storm flap lets you seal yourself inside; leave it open when extra ventilation is preferable
  • Highly compressible for easy storage in your pack
  • Item #MAR2297
[body] MemBrain Strata (20,000mm), [floor] 40D nylon ripstop, PU coating (3000mm)
fully taped
86 x 36 x 8 in
storm flap
Packed Size
9 x 6 in
Trail Weight
14 oz
Recommended Use
ultralight backpacking
Manufacturer Warranty

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