The Night Therapy bed frame by Zinus is uniquely designed for optimum support and durability. This bed frame adjusts to provide a sturdy foundation for your Twin, Full or Queen mattress set (box spring is required). The center bar support and 9-leg construction is unique and ensures superior stability. The bed frame is easy to assemble in a few simple steps. The support legs are intelligently recessed for safety, which helps you avoid hitting your toes when making the bed.