SG1 Imported Composite frame Photochromatic lens PC photochromatic Lens width: 67 millimeters Ultimate anti-vibration [ova] system: removable temples can be replaced by an elastic strap transforming your glasses into sports goggles Photochromic PC lenses Cat.1-Cat.3 (darker in the light and more clear in the shade) Removable foam-padded gasket: improves Solar and dust protection Pc lenses provide military grade impact protection (2.2mm) 100% UVA/B/C protection - fog-off : Anti-Fog treatment