Outdoor Research Advanced Bivy Sack

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The Outdoor Research Advanced bivy sack offers full-on weather protection and has a commodious design featuring a generous footprint for those who prefer a little more wiggle room .


  • 2 shockcorded Delrin® poles allow the bivy to open in several different positions from wide open to awning style
  • 3-layer Gore-Tex® Respiration Positive™ laminate fabric was created just for sleep systems—it's both vapor- and gas-permeable
  • Durable and waterproof Hydroseal® coated nylon floor; fully taped seams ensure waterproof protection
  • Removable, tightly woven no-see-um mesh provides lightweight, chemical-free bug protection that doesn't interfere with visibility; height is 20 in.
  • End-opening zipper with a wide storm flap allows easy entry and exit without sacrificing waterproofness
  • High-volume foot section with zippered vent allows sleeping bag to maintain full loft for optimal warmth around feet; height is 14.5 in.
  • Footprint is sized to fit thick sleeping pads for increased comfort
  • Straps keep your sleeping pad in place, preventing the bivy from rolling over during sleep
  • Small mesh pocket holds nighttime essentials
  • 5 stake loops and 3 guyline loops provide ample anchor points
  • Includes Delrin poles and stuff sack
  • Shoulder girth is 52 in.


View all Outdoor Research Bivy Sacks

Technical Specs

Best Use




Sleeping Capacity



2 lbs. 7 oz.

Packed Size

4 x 15.5 inches

Bivy Length

87 inches

Shoulder Width

26 inches

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