Built to provide technically advanced eye protection to enthusiasts of all sports and outdoor activities, Tifosi Slip sunglasses with Fototec lenses are guaranteed to enhance your sport whether you're running a 10k, riding a century, or heading out on the weekend for a kayak fishing trip. . Grilamid TR 90 frame offers an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. High Speed Red Fototec photochromic lenses provide 35.3 13.5% L.T. light transmission and offer a mid range level of contrast made specifically for high speed activities like cycling or running in full sun conditions. Fototec lenses transition in 10 seconds transition time is slower when inside your vehicle due to the UV protection in the windshield. 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 temples and nose allow for customizable comfort. All Tifosi sunglasses provide 100% UVAUVB protection.