This revolutionary tight top coil spring mattress from Safavieh arrives compressed and rolled in a vacuum sealed box for a more cost-effective shipping method. The 312 tempered steel coils cradle your body to provide maximum support and motion separation for comfort and sound sleep. Your rest is undisturbed because these durable， heavy gauge springs reduce motion transfer， while adjusting to your weight and body contours. The mattress unfolds instantly to its original shape when unpacked， unroll and it will return to its original shape in 48 hours.Full-size mattressPlush-firm support ratingBonnel spring support system312 tempered steel coilsFelt and foam interiorWhite outside coverErgonomic 6-inch designArrives rolled in boxMeets Federal Flammability Standard 16 CFR Parts1632 and 16336 inches height x 54 inches width x 75 inches lengthOnce opened this product is not returnable.