Velvet Twin size mattress is the solution for when you need a sleep surface such as an extra bed, a planned camping or RV excursion, sleepover, or a guest bed; Adjust from firm to plush with the touch of a button Features a vertical beam construction with built in edge support that prevents rocking, swaying, and side-to-side motion; Includes Electric Express Pump that inflates and deflates hands free within seconds Lower angle beam construction creates a 2" recessed lower panel, providing a suction effect with the floor; Upper angle creates an edge support system, keeping from rolling off the mattress during sleep Plush velveteen sleep surface prevents sheets from slipping and is made up of heavy duty puncture resistant vinyl; 100% leak tested Fits standard size sheets and can be spot cleaned with water; Measures 15" height and includes nylon carrying bag for when mattress is not in use or in transport