Nemo’s award-winning Sonic is updated to make a good bag better, with a few extra features to ensure you get a great night’s sleep. A redesigned collar and hood seal out cold and retain warmth where you need it. Stretch stitching at the knees maximizes internal volume and make side-sleeping easier in this form-fitting mummy bag. Thermo Gills™ allow you to dial-in the perfect temperature when you're warm, but the air outside is too cold to unzip – like cracking a widow. Overstuffed with 800 fill-power hydrophobic down to offer serious warmth in serious weather.
- Shell is ripstop nylon with soft nylon taffeta lining, both treated with a DWR finish
- Zippered Thermo Gills let you release extra body heat without letting cold air in
- 800 fill-power Nikwax Hydrophobic Down™ won't wet-out, staying lofty and warm in all conditions
- Horizontal and vertical baffles channel warmth along your body, reducing cold sports
- Hood provides a warmer, closer fit, keeping your noggin warm on cold nights
- Internal draft collar helps seal in the heat
- Stretch stitching at the knees helps maintain shape while increasing thermal efficiency and optimizing volume in the bag
- Toester™ waterproof breathable footbox has a DWR finish
- On-seam zippered pockets for small necessities
- Included compression sack and cotton home storage sack
- Covered by Nemo’s lifetime warranty
