Ready for adventures in all conditions, the Tifosi Tyrant 2.0 Sunglasses feature photochromic lenses that self adjust to varying light conditions. . Grilamid TR 90 arms offer an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Light Night Fototec lenses are perfect for activities that range from low to high light conditions. Are able to rapidly adjust to changing light conditions. Provide between 75.9% L.T. light transmission and 27.7% L.T.. Lenses are made of scratch resistant, shatterproof polycarbonate. Optically decentered lenses eliminate distortion and prevent distracting magnification. Lenses are vented for increased air circulation to prevent fogging and keep you cool. Hydrophilic rubber nose pad and earpieces ensure a non slip fit. Adjustable ear and nose pads allow for customizable comfort. All Tifosi sunglasses provide 100% UVAUVB protection. Best fit for small and medium profiles.