Winter campers require a sleeping bag that’s lightweight, easy to pack and unpack, and, most importantly, able to keep them warm while camping in zero degrees. Nemo’s Sonic Down sleeping bag checks all those boxes. It’s made with premium 850-fill down, has a temperature rating of zero degrees Fahrenheit, and when packed the bag weighs two pounds, 11 ounces.
But this sleeping bag goes beyond being just packable, lightweight and warm — it’s also innovative. In its chest are two of the brand’s patent-pending Thermo Gills, allowing sleepers to regulate their bag’s temperature (by as much as 20 degrees Fahrenheit, Nemo claims). When the Thermo Gills are closed, the sleeping bag retains its warmth; when zipped open, warm air escapes without letting in any cold drafts.
Additionally, the Sonic’s outer shell is made of 20-denier ripstop nylon that’s both waterproof and breathable. It has stretch construction at its knees, making it ideal for people who like to sleep on their side or, in the morning, sit cross-legged and move around in their sleeping bag. True, the Nemo Sonic costs $500; but it has more down insulation than most competitors in its price range. So, spend a little extra and you’ll get a best-in-class sleeping bag that you take camping three seasons out of the year. rei.com
Insulation: 850-fill duck down
Temperature Rating: 0 degrees Fahrenheit
Shell: 20-denier ripstop nylon
Key Features: Thermo Gills, stretch construction at the knees
Packed Weight: 2 pounds 11 ounces