... mattresstop ticking:High-grade Knitting fabric, plush and comfort.quilting:polyester wadding + 2cm thick relax polyurethane foam ... foamupholstery:1m high resilience foam, , provide more comfort level of the pillow topinsulator:plastic blanking net+PK ... friction of the mattresscore/spring:pocket spring as the mattress core, 2.0mm wire gauge, 5 turns, , ... the base, and long used time. comfort mattress