The Gasket Black Nickel Frame is the ultimate in comfort, fit and durability. By utilizing adjustable, hinge-free aluminum, each frame can be custom fit for any face type. The Blue Mirror Polarized Lens design has 19% light transmission, which allows for true color recognition. These high-quality lenses reduce the glare from the sun, making them perfect for the following uses: driving, fishing, boating, biking, outdoor recreation and everyday casual wear. They are not recommended for skydivers or pilots using digital gauges, due to Brewster's angle interference.