Wood HARDWOOD CONSTRUCTION: Headboard, matching footboard, trundle, and frame are crafted from durable hardwood and veneers for long-lasting strength. NO BOX SPRING NEEDED: Sturdy slat system supports your mattress and promotes airflow for a cooler, more comfortable sleep. TWIN XL TRUNDLE INCLUDED: Rolls out from either side of the bed, accommodates mattresses up to 8" high, providing flexible extra sleeping space; TRUNDLE DIMENSIONS: 38.46" (D) x 80.28" (W) x 11.61" (H) WEIGHT CAPACITY: 800 lbs ASSEMBLED DIMENSIONS: 82.76" (L) x 79.93" (W) x 50" (H)