The Backpacker Editor’s Choice Award Winning Sonic™ has been praised as the only bag you really need from -20 to 40 degrees. Now updated for 2019 with a redesigned draft collar and draft tubes to create a secure seal against cold air; overstuffed 800FP hydrophobic, RDS certified down; and an updated profile and shaped footbox, the Sonic™ continues to rock out as the King of Comfort from basecamp to summit.
The contoured hood with drawstring cord creates maxiumum thermal efficiency, and stretch construction at the knees allows side sleeping. Toester™ footbox is tailored for foot comfort, waterproof/breathable, and includes a layer of synthetic insulation to reduce cold spots.
specs
& sizing
| Capacity | 1 |
| Minimum Weight | 3 lb , 0 oz / 1.36 kg |
| Packed Size | 15.5 x 8.0 in dia / 39 x 20 cm dia |
| Temp Rating | 0F / -18C |
| EN Lower Limit | -1 |
| Fill Type | Down |
| Fill Weight | 1 lb , 9 oz / 720 g |
| Fits Up To | 6' / 183 cm |
| Shoulder Girth | 61 in / 155 cm |
| Hip Girth | 58 in / 147 cm |
| Knee Girth | 53 in / 135 cm |
| Compressed Volume | 7.7 |
| Capacity | 1 |
| Minimum Weight | 3 lb , 8 oz / 1.59 kg |
| Packed Size | 16.0 x 8.5 in dia / 41 x 22 cm dia |
| Temp Rating | -20F / -29C |
| Fill Type | Down |
| Fill Weight | 2 lb , 2 oz / 960 g |
| Fits Up To | 6' / 183 cm |
| Shoulder Girth | 61 in / 155 cm |
| Hip Girth | 58 in / 147 cm |
| Knee Girth | 53 in / 135 cm |
| Compressed Volume | 11.96 |
construction
& materials
| Shell Fabric | 20D Nylon Ripstop w/ DWR |
| Footbox Fabric | 40D Nylon Ripstop OSMO™ w/ DWR |
| Lining Fabric | 30D Nylon Taffeta w/ DWR |
| Color | Granite / Marigold |
| Zipper Location | Left |
| Stuff Sack | Compression stuff sack, Mesh storage bag |
| Insulation | 800 FP Down |
