Sierra Designs Baffin Drizone waterproof Bivy is one pound and super compressible. The Baffin is a minimalist bivy for alpinists, big wall climbers, and for use as an emergency back-up. Drizone fabric is weatherproof and breathable.

Length: 76 in
Width: 26 in
Packed Weight: 1 lb 1 oz
Floor Material: 70D Nylon
Body Material: Drizone 40D Nylon
PVC-free seam tape
Drizone single wall construction
Large mesh window