Peak dreamons 1.Belgium-based matress ticking treated with anti-bacteria process. 2.High density sponge , flexible and comfortable. 3.Non-woven prevent injury and sliding of inner. 4.Rigid composite cotton which can extend the life of the mattress . 5.Powerful auxiliary spring can prevent wai-collapse , also expand the use area . High carbon steel wire of f1577 astm; 2. The innerspring was manufactured by using the most advanced swiss machines. 3. The whole spring was heat-treated and totally tempered. 4. Before leaving the factory, each product undergoes high pressure compression of 18, 000 lbs to firm up its shape. 5.The innerspring will return to its original shape after it is unbaled. 6.Quality of the innerspring is the guarantee of the mattress life.