Oakley HSTN Metal is a round metal frame that embodies the spirit of innovation. The matte clear color and prizm violet lens treatment add an extra touch of style to this unisex sunglass, while the o matter frame construction ensures comfort and durability. Elevated yet approachable, these shades have all you need for everyday wear in an iconic round metal shape with prizm lens technology for enhanced color and contrast. Available with lens contrast enhancement technology.