Polaroid Celeb 3D Glasses - Gunmetal Grey Frame PDN4101B Polarized lenses optimally designed to block glare Polarizing light filter is sandwiched between lens layers Unique Polaroid Thermofusion process produces curved lenses without optical distortion UV light absorbers laminated to both sides of polarizing filter to provide UV protection against UVA, UVB, UVC rays Scratch-resistant layer applied to all lens surfaces