Rollaway with innerspring mattress. Heavy-duty construction with big wheel mobility. The ideal rollaway for contract use. Sturdy steel angle construction with heavy duty under-carriage. Durable polypropylene deck attached with 12 gauge tight wound helical springs. Two strands of KAY-ARC in the middle of the bed add posterized support in critical body weight areas. Two 8 in. fixed position wheels and two 5 in. ball bearing swivel wheels makes the bed easy to move up stairs, over curbs and other rough areas. Innerspring mattress included. Twin size 39 in. x 76 in.