Trans-Cling Clear Vision Polyester is a 2.0 mil print-treated clear polyester with a hard coat and a 90# poly-coated, bleached, layflat, polyester liner that promotes adhesion to glass or other ultra-smooth, non-porous surfaces. Trans-Cling Clear Vision Polyester (PET) is great alternative to a vinyl static cling since the material has a clean, soft peel from glass.