Mattress description:(1) Totally height: 18cm(2) Box packing: quantity in 40"HQ: K(322pcs); Q(385pcs); F(406pcs); T(553pcs)(3) Barrel packing: quantity in 40"HQ: K(420pcs); Q(511pcs); F(640cs); T(880pcs)(4) High quality brocade fabric, it is improted from Germany, environment and strong breathability, dust resistant, anti-mite function, no static electricity. Safe and health, soft and comfortable, green environmental protection standards.(5)Memory foam: 10cm, 60 kg/m3. This foam is sensitive to the heat and pressure of human to automatically adjust to body weight and temperature; it"memorises" them. It conforms to the curves of the body, relieving not only critical pressure points, but aches and pains that can accumulate throughtout the working days. Also reduces the effects of tossing or turning from a sleeping partner.(6) Foam: 12cm; optional density: 25 kg/m3, 30 kg/m3, 35 kg/m3. High density and resilience soft foam is more comfortable than normal foam, thermal effect of a more visible. The body with mattress is entirely fitting, support the vertebrae, keep the body comfort and smooth.(7) ISO 9001 : 2000(8) 15 years guarantee(9) US and UK fire retardant standard both are available(10) This kind of product is very popular in Internet and Supermarket.