A safe, comfortable and practical bed frame is essential for kids' bedroom. Our bed frame is composed of a twin-over-twin bunk bed and a rolling trundle. They are all made of solid wood and high-grade MDF, so the whole bed frame presents perfect sturdiness. Meanwhile, the upper twin bed comes with a 12.5" full-length guardrail to prevent kids from falling. On one side, there is a 15.5" wide 3-step staircase. Underneath, there are two open compartments for books and decorations. At bottom, the bunk bed has a rolling drawer for clothes. With these features, your kids' bedroom will become much tidier. Finally, there is no need for a box spring and the whole product will be delivered in two boxes.