Sonic™ Down Mummy Sleeping Bag C5

This selection brings together the verified details for sleeping bags equipment and use.

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 along with tuneability with a reduced environmental impact. This bag offers our next-generation Thermo Gill™ vents, with a new multistage zipper system that dramatically increases the usable temperature range of the bag along with makes it possible for fine-tuning of comfort from within. Sonic’s chevron baffle construction better compartmentalizes down, eliminating migration along with keeping the down evenly lofted. (Not to mention, it looks awesome.)

The shell as well as liner fabrics are 100% recycled fabrics as well as bluesign® approved, as well as 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, as well as bolstered draft tubes. Our proven Toester™ footbox keeps feet warmer, brings a waterproof barrier against tent wall condensation, as well as protects down from moisture while drying damp clothes inside the footbox. Adaptable to whatever the mountain throws at it, Sonic continues to reverberate as the ultimate extreme weather companion.