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Learn More"Less is more" doesn't always ring true, but the Alpine AscentShell Bivy packs as much as possible into a small alpine shelter. On our lightest ascents into the wilderness, this bivy offers serious protection in all four seasons. Outdoor Research's Helium AscentShell membrane keeps us secure in unruly weather, and it boasts breathability that ensures our outdoor comfort during the hotter months as well.
Responsible Collection
Bluesign ApprovedMaterial
[membrane/laminate] Helium AscentShell (3-layer), [face fabric] (fly) 30D nylon, PU coating, (floor) 40D nylon, TPU coatingPoles
1Ventilation
mesh canopySeams
fully sealedFloor Dimensions
83 x 28inFloor Space
79 x 32.5 - 22 x 19inPacked Size
3.5 x 12.25inTrail Weight
1lb 0.8ozPacked Weight
1lb 2.6ozManufacturer Warranty
lifetimeActivity
mountaineering, backpacking, ultralight backpacking