Elevate your fashion and optical standards with ray-ban rb3721ch chromance glasses. Crafted from durable metal, these square-shaped frames are designed to last. The polished black on silver finish adds a touch of sophistication to any look. The polarized lenses not only enhance clarity but also reduce glare for greater comfort and visibility. The blue chromance treatment optimizes light transmission, resulting in vivid color perception and superior contrast. These shades are sure to make a statement while keeping you comfortable and stylish all day long. Available with prescription lenses.