THERM-A-REST Women's ProLite Plus Sleeping Pad, Regular???? 5" high 6" wide Added Warmth: A variable pattern of our diagonally-cut foam provides added warmth for cold sleepers. Lighter: Atmos Foam reduces weight by nearly 10% Ultra-Compact: Atmos Foam boosts compressibility for easy packing. Self-Inflating: Expanding foam core self-inflates; top off with just a few breaths for personalizedfirmness. R-Value: 3.4