Our Twin Low Post Louver Bed features beautiful louvered detailing on the headbord and footboard. It comes complete with a hi-lo adjustable locking system that allows beds to work safely with or without a box spring. The Hi-lock position raises the bed to accommodate our Underbed Storage Unit or Trundle Unit for an extra sleep space. Comes complete with wood slat roll mattress supports; no need for box springs or "bunkie boards". Does not accommodate our Captain's Storage Unit.