Available only from Oakley, HDO offers unbeatable performance and protection. Oakley utilizes proprietary technologies like XYZ Optics to surpass these tests. HDO also includes Oakleys 100% UV filtering, as well as impact protection worthy of sports professionals. Impact Resistance When Oakley designs goggles, protection is at the forefront. The most stringent impact testing is called ANSI Z87.1. The high velocity test uses a stainless steel ball traveling at 102mph. the high mass test uses a 500-gram conical tipped missile dropped from a height of 50 inches. Fit/Comfort Developed with a 3-D CAD/CAM engineering for a true anatomical fit, Oakley MX goggles are designed to offer the highest level of comfort and performance. All Oakley goggles take advantage of the triple-density fleece foam for optimized comfort and maximum sweat absorption. Anti-Fog All Oakley goggles use the companys proprietary F2 anti-fog coating to eliminate haze in the heat of competition. Frame Composition Engineering breakthroughs in structural materials allow Oakley to produce lightweight, high-performance goggle frames that maintain superior protection and comfort. The polymers in O Matter goggle chassis are formulated for high durability and controlled flexibility for improved safety during impact, as well as maintaining resistance to ultraviolet radiation, humidity, thermal shock, and chemical exposure. Iridium Lens Coatings Oakley Iridium lens coatings allow the wearer to tune transmission for any light condition. Superheated metallic oxides are fused to the lens at the molecular level, permanently bonding to create a uniform filtering layer that optimizes contrast and minimizes glare. The coatings are specifically formulated to reduce glare and increase contrast while improving depth perception in a wide variety of light conditions.