Slumber 1 - 8'' Mattress-In-a-Box Full for a Good Night's Sleep in the Bedroom Tight top bed mattress with individual spring coils;Revolutionary rebound technology lets the mattress-in-a-box expand in minutes when unpacked Increased motion separation: springs provide undistributed rest;Slumber 1 spring mattress is constructed to adjust individually to your weight and body shape Heavier gauge steel coil for durability and comfort with the Slumber 1 Mattress-in-a-Box Full Dimensions:75 x 54 x 8