The MultiMat is made of 2 mm EVA (Ethyl-Vinyl-Azetat) foam and one side is backed by fast drying ripstop nylon. This makes Multi Mat waterproof, warm and tough while providing insulation against surface moisture, cold and stones. Also works as a carpet in your tent's vestibule, canopy or beneath your tarp. Folded lengthwise it forms a lightweight, closed cell pad for summer nights. Insulation and comfort can be increased by stuffing with clothing, foliage or your pack.