Extruded polythylene foam 1.Anti-collision and heat insulation 2.Smooth Surface 3.no toxic.durable in water Extruded polythylene foam1.Anti- ... collision and heat insulation2.Smooth Surface3.no toxic.durable in water ,could filter air,dustExtruded polythylene foam ... in water ,could filter air,dust.1 .pu foam material2, reticulated, mesh,10ppi-60ppi,3 good resilient, ...