The Western Mountaineering Versalite 10 sleeping bag is the sleeping bag I would choose if I could have only one. It can be used very comfortably between 10 and 40 degrees and pushed a little further in either direction. I’ve taken it below 10 wearing some layers and have draped it over me quilt style when temps are warmer than 40. The Versalite is pretty pricey, but worth it if it’s going to be your primary or only sleeping bag. I’ve owned mine for six years, during which time I’ve owned a number of other sleeping bags, but the Versalite has remained in my possession for longer than any of the others. The reason I’ve kept it around is that it’s a truly versatile sleeping bag.

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