Rudy Project Tralyx SLIM is a small or narrow version of the popular bigger "tralyx" model. For athletes that have smaller or narrower faces such as women and on't like wider looking sports frames then our Tralyx Slim will fit your needs. Approx 4.8mm narrower across the front frame mount thus creating a nice snug look for narrow small faces/ tralyx Slim has all the best sunglass features such as interchangeable lenses, adjust nose and temple ends to create this perfect fit. This model comes with a number of different lens tint options although the Photochromic black lens tint is our best selling lens. Its changes colour to UV light.