Big Agnes Sidewinder Camp 20°

The Big Agnes Sidewinder Camp 20° is a synthetic mummy bag from the Camp line, built for base camp and car camping rather than for shaving grams on the trail. Its cocoon-style, two-layer blanket quilting moves with the body of side sleepers and keeps the FireLine ECO (recycled polyester) insulation in place while rolling over, addressing a common weak point of standard mummy bags. A -2°C comfort rating and -7°C limit rating put it in the 3-season bracket, but the weight-per-degree figure of roughly 186 g/°C reflects the usual trade-off of synthetic fill: less warmth per gram than down. The nylon ripstop shell and polyester taffeta liner both carry a DWR finish, and a draft collar around the neck limits heat loss at the opening. At 1304 g it is not a pack for thru-hikers chasing a low base weight, but the recycled, PFC-free construction makes it a solid option for anyone who wants a more sustainable bag for weekend trips, cabin stays, or car camping where the extra weight rides in the trunk, not the backpack.