?The best view with PRIZM™ lenses. The Fall Line M has a medium fit and Ridgelock technology, allowing you to quickly and easily change the lens. Its frameless design ensures maximum peripheral vision in every direction. The soft O-Matter frame, in combination with the 3-layer foam, offers absolute comfort and the best fit. Prizm™ lens tech boosts colour and contrast for optimal colour representation and clarity.Prizm™ Snow Iced Iridium LensPrizm™ lenses adapt to weather conditions and provide optimal colour representation while maximising depth perception and greatly improving visibility. The lenses are injection moulded under extreme pressure with impact-resistant Plutonite® to create a precise contour with optically correct geometry and clarity.