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  • Current Steal

Outdoor Research
Interstellar Bivy

3 out of 5 stars
1 Review

Out of Stock

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Interstellar Bivy

The Outdoor Research Interstellar Bivy combines enhanced breathability with exceptional waterproofing worthy of four-season adventures whether you're backpacking minimally in the summertime or mountaineering in wintertime. Its waterproof Ascentshell membrane is air permeable instead of breathable, meaning it will breathe the moment you enter the bivy, as opposed to standard breathable membranes that only breathe until after you build up moisture with breathing or sweating. The Delrin single-pole system is quick and easy to set up, and you can leave it at home if you want to save some weight and packing space.


  • Four-season bivy for alpinists, backpackers, and winter campers
  • Ascentshell is waterproof and air permeable for high breathability
  • Multi-configuration lets you sit up an organize gear in bivy
  • Delrin single-pole system, guy line loop, and two stakes for setup
  • Item #ODR00X4
[membrane/laminate] Ascentshell (3-layer) [face fabric] 100% nylon (20D) [backer] 100% polyester (12D) [floor] 100% nylon (40D), TPU laminate
Delrin single-pole system
no-see-em mesh
fully sealed
Interior Height
17 - 15in
Floor Dimensions
82 x 26 - 19.5in
Packed Size
Trail Weight
Recommended Use
backpacking, mountaineering, ultralight backpacking, winter camping
Manufacturer Warranty

Overall Rating

3.5 based on 4 ratings

Review Summary

5 Stars - 1 reviews
4 Stars - 1 reviews
3 Stars - 2 reviews
2 Stars - 0 reviews
1 Stars - 0 reviews

Fits True To Size

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