... 2 Density from 6-40 kg/m3, 3 Used: Car, mattress,sofa,bed,chair... Name: SpongeType: Ordinary sponge, high resilience sponge ... , 7-70 unitsColor: CustomizedMaterials: Polyurethane, Polyether polyols, etc.Appliance: Car, mattress,sofa,bed,chair,cushion,pack... ONE OF THE MATERIAL... PRODUCTION ...