... is a Synthetic rubber foaming body,and commoned SBR,Diving materials,It's soft,elastic,waterproof,shockproof features. Neoprene is a ... Synthetic rubber foaming body, and commoned called SBR,CR,Diving materials in mainland China; and feel soft,elastic,waterproof,shockproof,insulation ... and more widely used for many filred as a new materials, because the cost drop . so there are four grade quality ...