Montbell U.L. Spiral Down Hugger #1 Sleeping Bag has been my bed buddy for a number of camping and backcountry skiing hut trips this year. Montbell has put a unique spin on the mummy bag concept using a number of innovations that have left me waking up on the right side of the sleeping pad. This is the kind of 3-season sleeping bag I would use on winter backcountry skiing hut trips and spring/fall camping trips as well as summer high altitude camping. Because I need to haul it in it has to be light-weight and because I am often sleeping in below 0ºC temps it has to keep me warm at night (a night sleeping cold is a night without sleep). So how does the Mont-bell U.L. Spiral Down Hugger #1 Sleeping Bag stack up?
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