100% UVA & UVB Protection keeps your eyes safe from the sun. Shatterproof Polycarbonate Lenses Meet or Exceed ANSI Z87.1 Standards. Half-framed design for light weight. Contoured fit keeps out wind, dust, and other debris. Durable, flexible, and lightweight TR-90 polymer frame This stylish design is engineered with a small frame for a snug fit. The lenses are virtually frameless for maximum vision enhancement!And, like almost every pair of 2017 Maxx HDSunglasses, the Stormis made from TR90 and includes our lifetime warranty against frame breakage. High Definition lenses enhance contrast by reducing the scattered blue light that causes objects to appear flat against backgrounds. Contrast is improved so objects appear more sharply defined. Colors are bright and vibrant. Glare is virtually eliminated, allowing your eyes to relax and see everything remarkably crisp and clear. The HD lens cuts through haze and glare for optimum visual clarity, even at a distance. Sharpens contrast while maintaining a natural, no-distorted color balance.