New product, technology & Deals
Receive updates by email and be the first to know

Molecule Bivy regular


Lightweight, Streamlined, One-Person Shelter
COLOR hops
SIZE: 1size - In stock
free shipping - This one’s on us!
Infinite Guarantee
One of the most tricked-out in our collection, the classic clamshell Molecule Bivy sports an overlapping zipper for easy breathing, a durable, waterproof, anti-fungal-coated 70D floor, a vented foot box and a no-see-um net to keep the bugs out. Small, lightweight, and weather-ready, this is perfect for light solo missions. The Regular Size Molecule Bivy is 84 inches long.
Fabric :
100% nylon 2.5L
70D ripstop
pu coating
100% nylon
70D with TPU lamination floor
Dimensions :
84 in. long
18 in. head space
11 in. foot box
25 in. head width
21 in. foot width
Weight :
21.5oz / 610g Avg. Weight for size One Size
  • Fabric Performance:
  • Waterproof
  • Breathable
  • Fully Seam-Taped
  • Durable
  • No-See-Um Mesh
  • Hydroseal® Floor
  • Anti-Fungal Coating on floor
  • Design Features:
  • Vented Foot Box
  • Five Stake Loops
  • One Guy Line Loop
  • Internal Mesh Pocket
  • Reflective Webbing


Alaskan Refuge


Although there are more expensive and heavier bivy's in OR's lineup I wanted something ultralight that would work in Alaska and Montana for all seasons. In winter the bivy extends the Plasma 15 rating closer to 0 degrees. The photos show how I added an upgrade 3rd party mosquito hood which allows the ultimate in protection during summer pursuits. My Marmot plasma 15 with Thermarest insulated NeoAir mattress fit inside surprisingly well. I could add a closed cell foam pad as well and still have room.



Molecule Bivy regular

5.0 1



Is the top material breathable and waterproof? IS the bottom material waterproof?

Whoopee pie Dave

Hi Whoopee pie Dave, Sorry for the late response. The upper/top isn't as breathable as the Helium, Aurora, Alpine, or Advanced Bivy due to the denser nylon (70D vs 30D), but it is still breathable for waterproof materials. The bottom/floor is waterproof. Thanks for contacting OR, Paul

How am I supposed to use the two stake loops at the top of the bag? I'm not using a sleeping pad of any kind, so the sac just kind of collapses a bit when I lay in it. Can't figure it out.


Hi Brandon, unfortunately the stake loops are there to prevent the bag from moving from it's initial position and it does not aide or help the bivy give it structure. Because of the design of the Molecule Bivy and the absence of a pole system, the material of the bivy might have a tendency to collapse inward. Thanks for contacting OR!