Maximize your child's bedroom space with the Twin over Twin Metal Bunk Bed. Are you looking to add more room for your child to study and play. This bunk bed is the perfect solution. Built shorter than the average bunk bed, provides a restful night's sleep to your children while also giving them enough room to have some with the friends during the weekend. With a strong metal frame, full-length guardrails and an integrated ladder, you will never second-guess your children's safety. The top bunk mattress must have a thickness of 6 in. maximum. An additional box spring or foundation is not required. Offered in multiple colors.