... low price, Spun bonded PP nonwoven is used as interliner in shoe industry widely, especially in gym shoes.5)Travel and daily ... interline for cases.Specility1. Light: Polypropylene is the main raw material; specific gravity is 0.9, is only third five, fleecy and touches well ... wash.4. Non-toxic, non-irritating: made of materials which catch up FDA standard, without other chemical composition, stable, ...