>>1436326Sleeping bags are not new technology. The proper term for "sleeping bags" in "yester year" is, "bed roll." That can be either non-stitched, fully stitched, or semi-stitched. Regardless, they were folded a specific way then rolled up and tied. It looked and functioned like a sleeping bag, since that is what it was minus zippers. Some had buttons on them though. They are quite comfy, warm, and still a viable means of bedding for camping out even in extreme weather. You can add more or remove layers as required.
