Single (Twin) XL size folding memory foam mattress. Machine-washable cover has soft bamboo top, breathable mesh sides, and non-slip bottom. 1.5" 3 lb memory foam atop 4.5" medium-firm foam for 6" total. Takes standard twin XL sheets. When folded, toss a throw on it and you have an ottoman. Add a couple of cushions for a chair. Unfold it for sleeping. 78" x 38" x 6" thick Folded is 38" x 26" x 18" Unused - got it for a guest who didn't come. $175 new, will sell for $100.