TWIN OVER TWIN BUNK BED FOR KIDS: Twin over twin bunk bed with ladder; Convertible bunk bed can be transformed into 2 individual twin beds for maximum versatility; Designed to fit any standard twin mattress (mattresses not included); Assembly required GREENGUARD GOLD CERTIFIED, SAFETY TESTED: Screened for more than 10,000 chemicals and VOCs known to pollute indoor air; Tested at third-party, accredited laboratories to meet or exceed applicable CPSIA & ASTM International category safety standards QUALITY CRAFTMANSHIP: Crafted of rubberwood solids, engineered wood, and wood composites; Includes fixed 5-step ladder and full-length safety guardrails for top bunk; Top bunk not to be used by children under 6 years of age AWARD-WINNING BRAND: Storkcraft is the proud recipient of the Parent Tested Parent Approved (PTPA) Seal of Approval for nursery and children’s furniture, and the 2018-2023 Women’s Choice Award for 9 out of 10 Recommended Baby & Kids Furniture BUNK BED DIMENSIONS (ASSEMBLED): Depth (41.97 inches) x Length (79.13 inches) x Height (64.72 inches) x Weight (142.80 pounds); Mattress must not exceed 7 inches (17.78 cm) in thickness