Classic full field of vision glasses with polycarbonate lenses to cover you for any weather and cloud cover. The adjustable nose piece and non-slip rubber tips allow for maximum comfort and security, working seamlessly with your helmet. The TR-90 plastic is lightweight and flexible, allowing them to bend without breaking. The interchangeable polycarbonate lenses are both impact and scratch-resistant. The lenses offer both supreme optical clarity and UV-A and UV-B protection. Cipher Glasses | Cycling Eyewear | George Fisher UK