Therm-a-Rest's ProLite Plus Sleeping Mat is made for year-round trips by combining comfort and warmth with amazing packability. The ProLite Plus uses thick, diagonal-cut lightweight foam to offer warmth, comfort and a small pack size. This sleeping mat is self-inflating and you can top it off with a few breaths for personalised firmness. With a WingLock Valve for maximum air flow and easier inflation and deflation. ProLite Plus Sleeping Mat