The Suncloud Callsign Sunglasses are the best addition to your shade game for city and outdoor activities. These sunglasses feature injection molded lenses that are manufactured with optical grade Polycarbonate using an injection molding process to ensure exceptional clarity and associated optical properties. This process helps to create a rigid polarizing film carrier and eliminates distortion. The Callsign lenses are manufactured with filters to provide 100% protection from the sun's harmful UVA/B/C and its tint is specially designed for elimination of glare and enhanced contrast while maintaining the accuracy of color transmissions. The Callsign will become your favorite sunglasses ever!