Made from selected solid pine wood and MDF and iron alloy bolts which keeps the whole bed sturdy and wobble free. Crafted with a whimsical playhouse design, this bunk bed comes with slide and storage steps. Features guard rails on the top bunk for added security and durability. No box spring required. 4-6" mattress thickness recommended for upper bed and 8" for bottom bed. Dimensions: 94"L x 41.6"W x 84.4"H; Upper bed supports up to 250 LBS, bottom bed supports up to 300 LBS.