Built for side sleepers who refuse to compromise on cold-weather rest, the Sidewinder 0 is our top pick for winter backcountry camping and late-season hunts. Its ergonomic cut rotates with your body so 650-fill DownTek water-repellent down stays lofted where it matters, while FireLine Eco synthetic insulation guards high-compression zones against cold spots.

• Ergonomic side-sleeper cut rotates with your body, eliminating the hip and shoulder pressure points that wake you up at 2am
• 650-fill power DownTek water-repellent down paired with body-mapped FireLine Eco synthetic insulation in compression zones keeps loft and warmth intact through a cold night
• Cocoon-style cinch hood seals heat around your head in sub-freezing temps; integrated Pillow Barn keeps your camp pillow locked in place all night
• Rated to 0°F — built for winter camping, cold alpine nights, and late-season hunting camps where a bad night's sleep costs you the next day
• RDS-certified down, a 3/4-length anti-snag dual zipper with draft tube, and a mesh storage bag for long-term loft maintenance round out a well-thought-out system