The Therm-a-Rest Alpine Blanket 35F is a favorite of backpackers and thru-hikers who appreciate minimalist performance. Unique construction and ultralight down insulation make it a lighter, more packable alternative than most conventional sleeping bags. The full blanket shape offers more comfort, versatility and freedom of movement, allowing you to roll, stretch and move across the entire span of your mattress. The Alpine integrates seamlessly with your mattress and an elasticized foot box and loop kit seal out drafts in temperatures down to 35F (2C).