this mattress inner spec as below: knitted fabric,memory foam, high density foam, pocket spring,all size ok , can ... item mattress is a newest design in mattress market , use memory foam , high density foam , pocket sring and soft kintted fabric ... :high-grade knitted fabric2cm quilted foam + 8000# polyester wadding2cm latex3cm memory foam1cm normal foam22cm pocket spring with foam edge1cm normal foam0 ...