About the oakley portal xa versatile frame design inspired by todays modern consumer, portal x can work for a variety of sports, yet it is also equally well suited off the field of play. Premium materials, prizm optics, and stylish, mainstream details make this an excellent collection for those seeking all day comfort in eyewear that is inspired and created to deliver exceptional clarity and lasting comfort. Prizm is a revolution in lens optics built on decades of color science research. Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility. Key features o matter frame material provides durability and all day comfort to keep up with life on the go unobtainium on the inside of the earsocks and nosepads increase grip when wet to help keep the eyewear securely in place prizm lens technology that is designed to enhance color, contrast so you can see more detail about oakley oakley first ventured into the cycling market with cycling sunglasses in 1984 after their successes in ski goggles. They have gone from strength to strength and have established themselves as the dominant pioneer in the sports eyewear industry through their innovation which constantly redefines the standard of eyewear performance. Their range encompasses everything from high performance models like the oakley jawbreaker with prizm lenses that fine tune vision for specific environments such as trail riding, or casual glasses such as the oakley frogskins that make sure you stylish off your bike aswell. Recently, oakley have started to produce cycle clothing including helmets, cycling jerseys and bib shorts. All oakley cycling clothing stays true to the design characteristics of being aesthetically pleasing without compromising sport performance while seeking to push conventional wisdom on what is possible. Eyewear buying guide