Thermarest ProLite Plus Self Inflating Mattress Lightweight: New tapered shape reduces weight by nearly 10%. Efficient Warmth: Unique, diagonal-cut foam provides Compact: Tapered design and high-performance foams eliminate excess bulk and roll up to a compact packed size Added Warmth: Extra insulation in the torso and foot provide warmth where it's needed most Dimensions: 20"x66"x1.5"