The reflex coil platinum mattress uses high density reflex foam which is firm and provides extra body support the reflex coil mattress has a boundary made of reflex foam around the bonnel springs to prevent you from rolling off the mattress while you sleep these traditional coil springs are used to give extra comfort this mattress comes complete with a zip off cover which is dry cleanable specification high density white reflex foam traditional coil spring system 24cm thickness dry cleanable