No-nonsense keyhole frames punch up smart retro-style sunglasses featuring Prizm?polarized lenses with HDO?technology for color-true clarity. 57mm lens width; 18mm bridge width; 137mm temple length 100% UV protection Prizm lenses enhance color, contrast and detail for an optimized experience Lightweight O Matter?frame material with Square O metal icon and front rivet accents Propionate Made in the USA