comfort spring mattress 1. Pillow top mattress with single thread ... fabric 2,3cm high density sponge 3,Pocked spring 4,5cm memory foam,PK foam and whith felt for ... inside 5,Deluxe three edge, surface folding wash, memory foam slow rebound effect, let every cell of the ... , useful in relieving fatigue, promoting sleep effect.Independent spring support system, pressure distribution, the balance of the body ...