The Stair Loft Lower Bed is designed to fit underneath the Loft and is equiped with locking casters ensuring this bed is easy to make and care for. Mattress ready with complete slat system (no foundation required); Bed is on locking casters allowing for ease of making the bed and cleaning of the space around it; Material: Hardwood & Veneer; Loft bed is mattress ready and sits on locking casters for easy cleaning ; You can order this loft as a twin or full size bed. ; Chocolate finish. Specifications:Overall Dimensions (Twin): 25.5" H x 42.25" W x 80" D ; Overall Weight (Twin): 56 lbs; Overall Dimensions (Full): 25.5" H x 58.3" W x 80" D; Overall Weight (Full): 78 lbs.