Weight matters even more when the weather's warm. Fortunately, that's when the Therm A Rest Auriga Blanket really shines. Rated at 35 degrees Fahrenheit, the Auriga is made with ultralight, ultra packable 750 fill power goose down to keep you moving fast and light. The Auriga packs a generous amount of heat, though, considering it only weighs about a pound and a half. Full length draft tubes and snap and loop integration with most camp mattresses eliminate drafts, and the blanket design won't restrict movement.