1 Flat foam sponge 2 Density from 6-40 kg/m3, 3 Hardness ... chair... Name: SpongeType: Ordinary sponge, high resilience sponge, super soft sponge, super-stretch sponge, high flame-retardant sponge, anti-ultraviolet sponge, high load-bearing sponge.Density: Customized, 6-40 ... , etc.Appliance: Car, mattress,sofa,bed,chair,cushion,pack... SPONGE USD FOR SOFA,BED, CHAIR... ONE OF THE MATERIAL... PRODUCTION ...