Rudy Project Noyz Glasses IT'S GREAT FOR: BIKING, CYCLING, RUNNING - Noyz is comfortable and light eyewear designed for the highest level of performance. This wraparound piece incorporates all the Rudy Project core features for unsurpassed protection, superior optical ratings and unbelievable comfort: ultra-light Grilamid chassis, QuickChange interchangeable lenses, new co-injected Ergonose 4 fully adjustable nosepiece and 360 adjustable temple tips in hypoallergenic Megol. Mounted with our new Photochromic Clear ImpactX lenses, the Noyz will ensure unparalleled wraparound protection and enhanced visual clarity for any performance, at any climatic condition. The Noyz is prescription-ready, either with our easy-in-easy-out patented RX insert, or direct, with our revolutionary ImpactRX program powered by Rudy Project's digital FreeForm TEK Lens technology. The ImpactX lenses: - Change shade to adapt to the athmospheric conditions and to offer you always a perfect vision - Assure the physical protection of your eyes against impacts, chemical and athmospheric agents - Guarantee sharp and clear images for an exceptional visual comfort The Rudy Project hi+ 1.6 provides far superior optics and scratch resistance when compared to traditional polycarbonate lenses and will offer amazing impact resi- stance over traditional plastic or glass lenses. They have superior optical qualities, eli- minate distortion, greatly enhanced cosmetic appearance, and offer lighter weight for unsurpassed comfort. High index lenses have a lower specific gravity than their traditional glass and plastic counterparts. Translated, these lenses are less dense. Other aspects, such as center thickness, decentration, and frame choice will also impact the finished product. The advantage of this is that a lens can be created using less material, therefore having less bulk and weight. Minus lenses are thicker at the outer edge; a high index lens decreases this, diminishing the bottle effect when seen form the side. Internal reflections will also be decreased.