15″ guardrails accommodate standard mattresses and keep kids safe. Slat design makes checking in at night easy. Includes slat rolls. Built-in storage towers with 4 roomy front-facing drawers with 3 book shelves behind it. The Twin Bed fits L-Shaped under the Twin Loft (option to add castors – purchased separately). Measures 81.5″ x 81.5″ x 68.5″ (LxWxH), perfect for smaller rooms. Recommended for 8 feet ceiling height above.