The detail of mattress’s structure and materials are listed below. height 20cmHigh-grade knitted thick fabric2cm(H),high density 30kg/m³foam50gsm non-woven fabric2cm(H),high density 30kg/m³foam2pieces 500g thick white barrier padmultifunctional balance net2.2bonnel spring system 6turnsmultifunctional balance net2pieces 500g thick white barrier pad50gsm non-woven fabric1cm(H),high density 30kg/m³foamHigh-grade knitted thick fabricAs a bonnell coil spring mattress or foam spring mattress, Forcom is strengthen in the materials,hundreds of bonnell coils and thick protective pad layer,formed a firm and durable bonnell spring system,provide excellent flexibility surpport. strengthened foam quilt layers,added the wavy,high-grade thick knitting fabric ,that is so comfortable that you are unwilling to get up. All 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.