Tifosi intense smoke interchangeable sunglassesbuilt for extreme sporting action, the tifosi intense smoke interchangeable sunglasses hit hard with shatterproof lenses and a durable frame that can really go the distance.the optically decentred lenses are built from polycarbonate which blends precision optics with protection against impact and abrasions. The lenses also offer full uva and uvb protection creating a restful field of vision.the smoke lenses come with a 15.4% light transmission which is great for bright lighting conditions. For a more specific coverage the sunglasses come with an interchangeable lens system which allows you to swap different tinted lenses in and out of the frame additional lenses sold separately.the grilamid tr 90 frame construction ensures a lightweight, flexible feel while promoting long lasting durability.featuressmoke lens15.4% light transmissiongrilamid tr 90 frame constructionhydrophilic rubber componentsoptically decentred lenseslenses made of polycarbonatefull uva and uvb protectioninterchangeable lens systembuy tifosi sports sunglasses from chain reaction cycles, the world's largest online bike store.