Sonic™ Down Mummy Sleeping Bag V8

Review the confirmed materials, specifications, and use details for this sleeping bags item below.

Sonic is built to be the only bag you need from -20°F to 40°F. The Backpacker Editors’ Choice award-winning big-mountain bag offers exceptional warmth as well as tuneability with a reduced environmental impact. This bag brings our next-generation Thermo Gill™ vents, with a new multistage zipper system that dramatically increases the usable temperature range of the bag as well as supports fine-tuning of comfort from within. Sonic’s chevron baffle construction better compartmentalizes down, eliminating migration as well as keeping the down evenly lofted. (Not to mention, it looks awesome.)

Adaptable to whatever the mountain throws at it, Sonic continues to reverberate as the ultimate extreme weather companion. The shell and liner fabrics are 100% recycled fabrics and bluesign® approved, and the premium 800 FP hydrophobic down is 100% Responsible Down Standard (RDS) certified. Years of history in the field yielded detailed upgrades on this bag, including a perfected profile, redesigned draft collar, and bolstered draft tubes. Our proven Toester™ footbox keeps feet warmer, delivers a waterproof barrier against tent wall condensation, and protects down from moisture while drying damp clothes inside the footbox.