Eye wear is useful to cyclists in many ways. One obvious use would be to keep the sun out of your eyes. Another would be to block wind. Eye wear can also protect your eyes by keeping dirt and other harmful things from going into the eyes. The Specialized Arc-X Optics, suitable for both road and mountain use, do this and more. They feature Specialized Adaptalite lenses which adjust to current light conditions. The Specialized Arc-X Optics are lightweight and durable, and they retail for $175. Purchase them at the Specialized online store.