... The jacquard fabric stiched to fire retardant pad. 5cm memory foam, high density foam, durable pocket spring,Bonnell spring. The comfortable jacquard fabric ... stitched to fire retardant pad,high density foam,non woven. 5cm memory foam,High density foam,Durable Pocket spring and Bonnell spring. ... materials we use in our mattress are subjected to our rigid quality control system, the spring we use can be ...