Sleep Master 8" Coil Mattress and Easy to Assemble Smart Platform Metal Bed Frame, Twin Tight top mattress with individual steel spring coils for undistributed rest Smart Platform Frame is 14 inches high with 12.5 inches of clearance under the frame for under bed storage Assembles easily to provide strong, level support for your mattress Our patented compression & folding technology allows our mattresses & frame to be put in and shipped in one box All Foam is CertiPUR-US Certified for durability, performance, and content