Tifosi ventus sunglasses for 2011 feature an interchangeable lense format that are fast and easy to change these tifosi ventus riding glasses are supplied with 3 decentered polycarbonate lenses and comprises of a smoke or brown glasses lense with glare guard for when the sun is high ac all conditions red lense for sunny to cloudy days and a clear lense for low light conditions the tifosi ventus glasses benefit from polycarbonate ventilated interchangeable lenses that are cool smart pract