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Outdoor Research Alpine AscentShell Bivy Bag NEW 2022 Model


Out of stock


Ideal for alpine pursuits and extreme weather, the Outdoor Research Alpine Ascent Sheel Bivy sack gives you protection and comfort for the best night sleep. Lightweight durability of Pertex® and breathable waterproof AscentShell™ makes for a faster and lighter solo shelter that you’ll bring everywhere. Drastically improved breathability, extra large headspace, a step-in opening and a no-see-um mesh makes this Bivy the ultimate solo adventure companion.



  • Upper: bluesign® approved AscentShell™ x Pertex® Shield Air Diamond Fuse 3L 100% Nylon
  • Floor: 100% Nylon 40D with TPU lamination
  • Mesh: bluesign® approved 100% Polyester



528g with pole, 479g without pole



  • Waterproof
  • Breathable
  • Ultralight
  • Fully Seam-Taped
  • Durable
  • No-See-Um Mesh
  • Single-Pole System
  • Two Stake Loops
  • One Guy Line Loop
  • High Volume Toe End
  • Extra Head Room to Store Gear
  • Large Side Opening
  • Fly Fastener Exposes Mesh Screen
  • Extra Large Mesh Screen for Star-gazing