TwisterCane(TM) BioFoam Sleeping Pads are engineered for ultralight 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 air pad for added insulation. Made from sugarcane biomass in a process that removes carbon from the atmosphere and sourced in an environmentally sustainable manner.