All-season warmth, self-inflating convenience, and lightweight foam make Therm-a-Rest's ProLite Plus Sleeping Pad a favorite among backpackers, winter campers, and ski tourers. Its Atmos foam reduces weight, enhances compressibility, and adds warmth with Therm-a-Rest's patent-pending diagonal-cut design. The self-inflating valve gives this pad plenty of cush, and you can add a few extra breaths for customized firmness.