Optically clear and disposable the Ironwear 3956 face shield protects the entire face without obscuring the wearers vision The soft foam headrest lays across the forehead for comfort and holds the 100 PET polyethylene terephthalate shield off the users face to allow room for eyewear and masks The stretchable polyester strap adjusts to most head sizes creating a snug and comfortable fit This full length face shield is intended for use against liquids and particles however it is not approved for impact or open flames or sparks