Glacial tortoiseshell-patterned frames elevate these smart sunglasses fitted with gradient, polarized CR-39 lenses for true visual clarity. 56mm lens width; 17mm bridge width; 145mm temple length 100% UV protection CR-39 lenses Acetate Imported DIFF Eyewear participates in give-back initiatives that provide reading glasses to those in need This product meets Nordstrom Give Back criteria: A portion of the proceeds benefits people, animals or the planet through charitable giving