This Sleep Master folding guest bed by Zinus is the same size as a twin-size bed. Most folding or rollaway beds measure 30 inches wide, but our folding guest bed measures 38 inches wide x 75 inches long. It has a 4 inch foam mattress to give your guests a comfortable night’s sleep away from home. The top layer is 1 inch of Pressure Relieving Comfort Foam with 3 inch High-density Base Support Foam for support. Only the Highest Quality of Foam – Foam is CertiPUR-US Certified for durability, performance, and content. The grid design of the metal frame provides support and prevents the mattress from sagging. The frame sits 14 inches off the ground, leaving room underneath to store luggage. The guest bed folds in half for portability and makes it easy to tuck away when not in use. Another comfort innovation from Zinus. Pioneering comfort.