Therm-a-Rest NeoAir Trekker Mattress Comfortable: internal truss system stablizes matteress for unmatched stability and comfort Compact and lightweight: Manually-inflated designs allows sugnificant weight savings and compact, go-anywhere storage Durable: Rugged fabrics provide added protection from punctures and abuse, adding versatility Warm: Patent pending triangular Core Matrix technology provides twice the warmth of other uninsulated air mattresses. R-value: 2.1 Dimentions: 63x196cm/25x77in