What is the difference between the Dark Gray and Amber lenses?
Polar-Optics Dark Graylenses are dark gray in color and are recommended for use on bright sunny days. They provide a minimum of 99.8% Harmful UV ray protection and absorb 80% glare. Polar-Optics Amber lenses are amber (orange/brown) in color and are recommended to provide contrast in flat light conditions or overcast days as well as provide sun and glare protection on bright sunny days. They provide a minimum of 99.8% Harmful UV ray protection and absorb 80% glare and eliminate 95% of the blue light spectrum while still meeting or exceeding FDA Signal Light and Impact tests.