Kids bunk bed made of solid pine wood, plywood, MDF board and built-in reinforced wood slats, strong support for kids and teens. The bunk bed frame is constructed from selected solid pinewood and iron alloy bolts which keeps the whole bed sturdy and wobble free.No box spring required. Perfect Mattress Foundation. Functional and aesthetic, this bunk bed will enhance any bedroom. This twin over twin bunk bed provides an extra trundle option and four spacious drawer stairs. The trundle bed is great for guests and friends. Four storage stairs provide ample storage for your little ones' toys and bedding. Wheels at the bottom allow the trundle bed to be pulled out smoothly and effortlessly. This wood twin bunk bed is an excellent safety, All four sides of the upper bed are equipped with protective guardrails to prevent little ones from accidental falls to keep them safe and secure during play or sleep. The sturdy built-in Staircase makes it easy for child to climb up and down, and the sturdy legs that made of Pine wood can add strength and durability.