A flexible wrapping material resistant to flex cracking and pinhole development and impervious to gas and moisture made by bonding a sheet of biaxially oriented polypropylene to one surface of a sheet of cellophane coated at least on one side with vinylidene chloride copolymer (Saran) and bonding low density polyethylene or other heat-sealable polymeric layer having a melting point substantially below that of the polypropylene to the other surface of the cellophane sheet.