Guests do not always call ahead, and this cot size rollaway is built for exactly that moment. Between visits it stands upright as a slim 31 x 13 x 42 in column, rolling on four universal wheels so one person can steer it out of a closet and down the hallway. Release the hook-and-loop strap, let the legs swing down, and in seconds it becomes a complete 75 x 31 x 16.5 in bed with the mattress already aboard, sparing everyone a midnight scramble to inflate anything. The sleeping layer is a genuine 4 in mattress, 73.5 x 31 in of contouring memory foam over high-density sponge, wrapped in a breathable knit cover with a non-slip base. Beneath it, a heavy-duty metal wire deck rides on U-shaped reinforced legs and crossbars, rated to 485 lbs and finished with non-slip foot pads that spare the floor. Dual mattress retainers keep the mattress square on the frame, two of the four wheels brake to hold the bed steady through the night.