Therm-a-Rest NeoAir All Season Mattress Year-Round Warmth: Patent-pending construction uses multiple layers of reflective ThermaCapture technology to trap radiant heat NeoAir technology allows the All Season mattress to be lighter and more packable than mattresses filled with conventional insulation Extra Comfort: Stable construction and 2.5-inch thickness offer greater comfort for a full night of sleep The All Season mattress can be inflated directly without the worry of exhaled moisture wetting insulation and decreasing performance Stuff sack and Mini Pump included - R-Value: 4.9.Measures - 25 x 77"