FIT & DESIGN: Impacto lens technology is tested by Zeiss to provide the highest-level eye protection Sunglasses fit comfortably underneath hat brim during play and securely on top the bill as conditions change TR90 sport-specific frame with rust-proof cam hinges offers mobility with a secure fit Ri-Pel(TM) scratch-resistant lens coating repels dirt, oil, and water in tough weather conditions Flexible, lightweight design fits a wide variety of head sizes by applying gentle pressure without pinch ADDITIONAL DETAILS: Lenses produced by Carl Zeiss Vision Interchangeable lens, temple tips and nose bridge components for personalization included 138-0-121 Frame