memory foam, density and cover is customized. cover: velvet, jacquard velour, terry, etc. packing: roll, vacuum with bag, etc. 1.sensitive to body weight and temperature2.conforms to your body shape,improve the quality of your sleep,relieve your body pain3.return to original shape after use,sofu and relax feeling for design4.moulds to your body shape for the ultimate in comfort and support5.cover ...