Tifosi eyewear alliant gunmetal blue interchangeablecombining streamlined angles and top quality materials these are the ultimate glasses for cyclists, runners, and endurance athletes. Lenstifosis alliant performance sunglasses come with a single, polycarbonate lens which provides a vast, uninterrupted surface area of protection and stretched peripheral vision. Integrated ventilation holes ensure that the lens keep the lenses from fogging when conditions become hot and humid. The glasses come with a blue clarion lens which has a 14.7% light transmission which is best suited to bright lighting environments. For alternative coverage the glasses come with a quick and easy interchangeable lens system. Framefor the ultimate level of comfort, the frame is made of grilamid which is specialised nylon material characterised for having an extremely high alternative bending strength as well as being incredibly rugged. Hydrophilic rubber interior detailing plus adjustable nose and ear pieces help stabilise the glasses and keep them in place even when youre at your most active.features14.7% light transmissionventilated lensuv protectionlens made of polycarbonategrilamid tr 90 framehydrophilic rubber detailingoptically decentred lens designglare guard lens treatmentcomes with protective caseadjustable componentsinterchangeable lens designbuy tifosi eyewear from chain reaction cycles, the world's largest online bike store.