Fit for a Princess. The Princess Castle Tent Bunk Bed with Slide includes a tent over twin bed and a covered hiding place below. The top of the slides is tented with a Princess Tower with peek through, fold down window covers. Finished in White Powder Coat with Purple & Pink Microfiber fabric tent- 100% polyester. Uses a standard twin size mattress (sold separately). Only use a twin size mattress that is 74-75" long and 37.5-38.5" wide. Bunk bed is tested and certified by an independent testing laboratory to meet all minimum requirements of ASTM F1427-07 and U.S. CFR 1213 and 1513. Some assembly required.