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 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. Sonic’s chevron baffle construction better compartmentalizes down, eliminating migration and keeping the down evenly lofted. (Not to mention, it looks awesome.)
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, provides a waterproof barrier against tent wall condensation, and 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.
| Specs | 0℉ / Regular |
|---|---|
| Minimum Weight | 3 lb 4 oz / 1.47 kg |
| Packed Weight | 3 lb 6 oz / 1.53 kg |
| Packed Size | 13.5 x 9.5 in dia / 34 x 24 cm dia |
| ISO Comfort | 14F / -10C |
| ISO Limit | 0F / -18C |
| Fill Type | 800 FP Down |
| Fill Weight | 1 lb 12 oz / 790 g |
| Fits Up To | 6' / 183 cm |
| Shoulder Girth | 63 in / 160 cm |
| Hip Girth | 58 in / 147 cm |
| Knee Girth | 53 in / 135 cm |
| Compressed Volume | 9.6 L |
| Shell Fabric | 20D 100% Recycled Nylon, Bluesign Certified Ripstop w/ DWR |
| Footbox Fabric | 100% Recycled Nylon, Bluesign Certified |
| Lining Fabric | 20D 100% Recycled Polyester, Bluesign Approved Taffeta w/ DWR |
| Color | Goodnight Gray / Goldfinch |
| Zipper Location | Left |
| Insulation | Down |
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