The World Class features a unique 14" spring, cotton, and foam futon mattress compressed to finish at 8" thick. The core is made of 560 individual pocketed cells, surrounded by two layers of cotton polyester blend, two layers of a lofted fiber pad, and one layer of Visco Slow Recovery foam. It is designed to take the constant folding and unfolding that is typical of futon use. Unmatched in quality in comfort, the World Class is a must if you plan on using your futon for more than occasional use. The World Class virtually eliminates the transfer of motion by tossing and turning, making your sleep the ultimate escape!