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Outdoor Research Interstellar Bivy

Outdoor Research Interstellar Bivy

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Full-Featured Bivy Sack

Compact and ready for any weather, the Outdoor Research Interstellar bivy is a versatile addition to any minimalist backpacker’s arsenal. It features a waterproof, three-layer AscentShell 20d ripstop nylon upper and a TPU-coated 40d ripstop nylon floor for complete protection from the elements. The seams have been taped to prevent moisture from seeping through. An all-new side-entry zipper makes getting in and out of the bivy quicker than ever. Finally, thanks to the guyline loop and Derlin single-pole system—reffered to as the Sombrero—you'll have enough headspace to sit up inside the bivy. 


  • Outdoor Research
  • Upper material: 3L AscentShell 20d ripstop nylon
  • Floor material: 40d ripstop nylon with TPU 
  • Waterproof
  • Air permeable
  • Fully seam taped
  • Guyline loop
  • 2 stake loops
  • Derlin single-pole system
  • Dimensions: 82 x 26 x 17 in (208.2 x 66 x 43.1 cm)
  • Weight: 19.9 oz (464 g) 


All orders will be shipped by Massdrop.

Estimated ship date is Mar 8, 2019 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.