ethane, ionomer resin and the like, or a laminate film thereof, or a porous film or sheet, non-woven fabric or woven fabric made from rubber, the above-mentioned synthetic resins, polyesters such as polyethyleneterephthalate and the like or polyamides such as nylon and the like, or a laminate of these and the above-mentioned synthetic resin film, and the like can be mentioned.