We pack up The North Face One Bed Sleeping bag when we need one bag to keep us comfortable in a wide range of temperatures. The 3-in-1 style of the bag has options to keep us comfortable at 15F, 30F, and 50F, allowing us to sleep comfortably on cold nights in the early spring and late fall or the still, stuffy nights of mid-summer. The rectangular shape gives us plenty of room to move in our sleep without getting tangled in a web of material, and the soft construction brings the comfort of home to the campground. The ThermoBall Eco insulation on the two outer layers is lightweight and lofty, and the box baffle construction evenly distributes warmth to eliminate cold spots while we snooze.