Superbly crafted for optimal UV protection and visual clarity in a variety of outdoor applications Oakley's Polarized M Frame Strike Sunglasses are specifically designed to reduce glare from reflected light sources. These versatile sunglasses are favorites for cycling running and ultra-marathons although you'll also spot Oakley M Frames in specialized sports such as the biathlon speed skating beach volleyball and archery events--especially in bright light. While most sunglasses manufacturers rely on sandwiching a layer of polarized film between two lenses and calling it good Oakley designs their polarized lenses through a special liquid fusion technology that introduces the polarized filter while the lens material is still in a hot liquid state bonding the film at a molecular level that doesn't leave you peering through the glue residue that other polarized lens manufacturers leave behind. It's one of the reasons that Oakley eyewear recently dominated Private Pilot Magazine's Sunglass Optics Shootout 2 in an extensive variety of performance categories. These Polarized M Frames can be interchanged with other Oakley M Frame lenses so you can match the Visual Light Transmission performance of specific lenses to varying light conditions.