The Big Agnes TwisterCane™ BioFoam Sleeping Pad is engineered for ultra-light backcountry summer trips to high alpine winter conditions. The closed-cell foam technology provides a firm, cushioned barrier between you and the ground; smooth on one side with a tire tread pattern on the other. Use alone or layer it with an one of Big Agnes’s excellent air pads for added insulation. Made from sugarcane biomass in a process that removes carbon from the atmosphere and sourced using Proforest standards.Big Agnes Twister Cane Bio-Foam Sleeping Pad 20” X 72” Features: Unique EVA foam contains more than 60% sustainably grown sugarcane resin Pair with an Air Pad for Four Season comfort Thickness 13mm 20" x 72” or 51cm x 183cm R-Value 1.7 Packed Size 18cm x 51cm Weight Approx 397g