... fabric 2,4cm 25D foam 3,Special 3-zone pocket spring 4,2000#polyester wadding Mattress description 1 ... 25D foam4. Non-woven fabric 5. Special 3-zone pocket spring (pocket in pocket spring in the middle ... zone):2.0+(1.8/1.6)+2.0mm, ... the most advanced springs design in the world: 5-zone pocket springs, Micro-pocket springs, pocket in pocket springs ...