Anyact Metal Twin over Twin Bunk Bed with Storage Bag, 2 Convertible Twin Beds Loft bed, Black BrownSturdy and Durable Bed FrameThis loft bed is made of 100% solid metal with full length guardrails and metal slat support, all of which give this bunk bed a lower bunk weight capacity of 440 lbs and an upper bunk weight capacity of up to 330 lbs. Ultimate Space UtilizationThe Anyact bunk bed adopts a space saving design concept. The upper and lower bunks can be separated into two individual beds, providing sleeping space, or assembled as a bunk bed.