The worldstores orthopedic memory mattress consists of an open coil spring unit and a 12mm layer of memory foam this mattress features polyester and duo pads on both sides and a quilted panel and border with memory fibredimensionssmall single w 75cm x d 190cm x h 24cmsingle w 90cm x d 190cm x h 24cmsmall double w 120cm x d 190cm or h 24cmdouble w 135cm x d 190cm x h 24cmkingsize w 150cm x d 200cm x h 24cm w 180cm x d 200cm x h 24cm