The detail of mattress’s structure and materials are listed below. 200g velvet fabric cover with zip 4cm D45memory foam 14cm D25 high density foam 75g non-woven cover 200g velvet fabricvisco-elastic foam systerm High-density visco-elastic memory foam moulds to your unique baody shape. promotes better sleeping.Evenly distributes and absorbs weight to help relieve body pressure.Superior pressure relief reduces back pain.Created correct spinal alignmentPromotes deep REM sleepRelives joints and neck pain Base foam suppurt systerm Extra firm supportNever sags or needs turningSupprior formulation for unsurpassed durabilityHighly resistant against body impressionsGuaranteed to never flatter outAll size are availble,demand on your requirement,all material of coil spring mattress also can be make an order. OEM service offer15year warrantyQuality can be assured various of mattress are available. natural cotton material give you better enjoyment,the only choice of distinguish relax sleep.we can manufature all dimesionbonnell spring mattress with thick quilt layer,such as king,queen,twin,full and others.you may custome the pillow top coil spring mattress according your requirement of the size,latex foam,surface fabric,spring and others.we are professional mattress manufaturer,the excellent factory and supplier in China,we have enough ability to take your mattress order and make you most satisfied.