Sonic 0 Down Sleeping Bag LENGTH:Long The return of a classic

The return of a classic

TPU overlays for durability

Material allows air or moisture vapor to pass through

Beyond this exceptional foundation

the highest given

Sonic 0 Down Sleeping Bag LENGTH:Long The return of a classicSonic 0 Down Sleeping Bag The Backpacker Editors Choice award winning big mountain bag offers exceptional warmth and tuneability with a reduced environmental impact. This bag features our next generation Thermo Gill vents, with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine tuning of comfort from within. Sonics chevron baffle construction better compartmentalizes down, eliminating