[Sturdy Construction] Made of high-quality solid pine wood and MDF with reliable construction, this twin over twin bunk bed frame can last for long time use and ensure strong stability and durability. [Functional Design] There is plenty of space under the bed, making it a great place to play. In addition, a mattress can be placed under the bed to provide a place to rest for overnight guests. [Storage Space] The wood house bed with storage staircase offer storage space for clothes and toys, Maximize space and help to develop your child’s habit of storage,It’s a perfect space-saving solution to you. [Safety Guaranteed] With full-length guardrails, this bunk bed offers a safe space for you to get a good night's sleep. [Easy Assembly] Overall Product Dimension:77.4''L x 41.7''W x 73''H. Mattress is not included. Some simple assembly is required, although we have provided clear instructions and tools.