Dodging 240-pound linebackers while running a sub-4.4 40 demands the best in optical clarity. That's why Oakley® football shields with HIGH DEFINITION OPTICS® (HDO®) are the brand of choice for players on both sides of the ball from high school to the pros.Using HDO technology, Oakley® football shields eliminate the distortion found in the industry's first-generation polycarbonate visors. Oakley® uses PLUTONITE®, a proprietary synthetic that sets a new standard for durability. Whether it's helmet-to-helmet collision, eye gouging or wind-blown debris, PLUTONITE offers the highest level of protection. But it's not just the material that makes Oakley® shields better. It's the geometry.Oakley® uses injection molding to shape the shield with unique curvature. The contours are designed with CAD/CAM engineering to maintain clarity at all angles of vision, even at the sides, so peripheral view is optimized. PLUTONITE shield material inherently blocks 100% of all UVA, UVB, UVC and harmful blue light up to 400nm. That means even clear Oakley® shields filter out all the bad rays. All Oakley® football shields are manufactured with AFR lens treatment, which translates to anti-fog performance and improved scratch resistance. Optional lens tints allow the player to precisely tune light transmission for game conditions, offering yet another competitive advantage with Oakley® technology.IMPORTANT NOTE:Shields may not be returned if used / mounted to a helmet. Prior to purchase, please check with your coach to determine if shield use is permitted in your district.Not recommended for Riddell Speedflex and Speedflex Precision helmets.”