Matte Black Frame, Photochromic Smoke Safety Lens with Gray Foam. Lenses chemically react to UV rays and change to smoke (16%) when outdoors or with exposure to UV light, than transition back to clear (89%) when indoors.

Features

• Completely clear indoors and at night
• Fast fade back speed
• Meets ANSI Z87+ safety requirements
• 100% UVA and UVB protections
• Dimensions: 160mm x 140mm x 45mm