Wood STAIRCASE STORAGE SOLUTION: Keep their space organized with a staircase that features built-in shelves and a spacious storage drawer—perfect for easy cleanup. The inner storage drawer measures 36.14" long, 11.65" wide, and 5.8" high. SLEEPOVER-READY: The pull-out Twin trundle provides an easy solution for hosting guests, offering a comfortable extra bed that saves space. Designed to fit a Twin mattress up to 6 inches thick, the trundle measures 38" wide by 75" long BUILT TO LAST: Made from solid wood and veneer with non-toxic, low VOC finishes for a durable, safe design perfect for kids and built to last BUNK SAFETY & COMFORT: The upper bunk is equipped with a full-length guardrail for added security, ensuring peace of mind while your child sleeps ASSEMBLED DIMENSIONS: (L) 93.11" x (W) 56.69" x (H) 63.11; WEIGHT CAPACITY: 1000 lbs total, with 600 lbs for the bottom bunk and 400 lbs for the top bunk