... air permeability, filterability,moisture retention,hydroscopic propert,water-proofing,flexibility soft feel,light in weight good air ... permeability, filterability,moisture retention,hydroscopic propert,water-proofing,flexibility,dont be flufiness, soft feel,light in ... agentPolypropylene belongs to the blunt substances and moth proofing, can isolate the erosion aroused from the liquid ...