Cuben Bivy:


One of the lightest bivys we offer, weighing in at 4.25oz with the standard chest zipper. This bivy is for the serious ultralight backpacker who wants to save as much weight as possible.

Standard Features:

-0.8 oz Dyneema® Composite Fabric floor

- Argon67 breathable/water resistant ripstop nylon top fabric

- 0.5oz Noseeum mesh window

- #3 YKK zipper across chest with dual pulls

- 4.25oz for standard length/standard girth with chest zipper

- 4.5oz for standard length/standard girth with side zipper

- Grosgrain pullout to keep netting off face (shock cord included)

- Double-stitched seams

- Stake loops at all corners (4 total)

- DCF stuff sack included

- Made in Montana

  • Sizing:

    Length: Standard fits users up to 6'1", Long fits users up to 6'4"

    Width: Standard is 73" in girth at the shoulders, 64" at the feet. If the user is under 180lbs, use a regular width.

    Wide is 78" at the shoulders and 66" at the feet. If the user is 180-220lbs, use a wide. If you use a 25" wide pad, go with a wide regardless of weight.

    For users over 220lbs or 6'4", please contact us for custom sizing. Custom sizing is free in nearly all cases.

    Each oversize option (long length, wide girth) adds about 0.2oz, so a long/wide would weigh ~0.4oz more


  • Side zipper option:

- Adds a zipper that goes across the chest like normal, but then turns and runs down the side for 20"

- Standard zide zipper goes down left side, but right is available for free, just send an email after buying that you want the zipper on the right

Were you quoted extra for custom work, or need to add international shipping? Click here

The 7-26 batch is now sold out. Next batch date TBD

Chest Zipper Model - $180

Side Zipper Model - $185  Made in the USA

Contact us:

Any questions? Send us an email at, and we'll help you out!


Click images to enlarge

Ultralight Bivy - cuben


Ultralight Bivy - cuben


cuben bivy