Heavy Duty White Bunk Bed Frame Twin Over Double Full latex The Logan Suite Mattress was 10739220 The Logan Suite Mattress was designed for 1 or more people who know they need a Luxury firm mattress and also love sleeping on organic Twin Only: Twin (39”) 5" for twin width) Under Bed Clearance 10 12 inches (Storage space) Mattress Mattress Size Compatibility Twin (Top) Double (Bottom) Recommended Maximum Mattress Thickness (Top) 6 8 inches (For safety railing height) Box Spring Required No (Platform Slat support included) Capacity Weight Capacity (Top Bunk) 200 lbs 250 lbs Weight Capacity (Bottom Bunk) 250 lbs 300 lbs Features Ladder Type Integrated This bunk bed is designed for durability and safety