Marmot Idlewild 30° Doublewide Sleeping Bag

The Marmot Idlewild 30° Doublewide is a two-person rectangular camping bag rather than a backpacking piece — at 3090 g with 2170 g of Spirafil Recycled LT synthetic fill, it is built for comfort and shared warmth at a car-camping site, not for carrying on trail. The synthetic insulation trades the weight-to-warmth efficiency of down for fill that keeps insulating even if it gets damp and skips the careful drying and storage down demands. Rated to -1°C by the manufacturer rather than independent EN testing, treat that figure as a rough guide for mild three-season camping, not shoulder-season backpacking. A full-length, two-way locking YKK zipper with a draft tube limits heat loss at the closure, and the bag is coupleable, so it can zip together with a compatible single Idlewild bag to form a wider double setup. Packed size is 53 x 29 cm — sized for a car trunk or basecamp pile rather than a pack — and the 75-denier polyester shell favors durability over packability, which fits its car-camping role.