-QAULITY FIRST since day 1- IKON LENSES has been offering Ultra-Premium polarized replacement lenses for over 10 years. Designed, manufactured, and tested in the USA - IKON LENSES are second to none when it comes to performance and fitment for your Oakley Crankshaft Sunglasses. Our polarized replacement lenses are made from the same injected molded polycarbonate as your original lenses, plus we incorporate the newest polarization and anti-glare features to protect your eyes and reduce eyestrain.