Oakley Portal X Sunglasses (Polished Black with Prizm Tungsten Polarised Lens) A versatile frame design inspired by today’s 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. Oakley’s exclusive Prizm lens technology has been designed to enhance colour and contrast, so you can see more detail. Oakley lenses have also been designed and tested under extreme high mass and high velocity circumstances to ensure uncompromising protection across a wide range...