NIKE EV0934-061 Trainer sunglasses matte crystal anthracite/black, dark grey lens features NIKE max optics lens technology for precise visual information at all angles of view. The Trainer sunglasses have lightweight nylon frame for comfort and durability. There is auto-adjusting ventilated nose bridge for a customized fit and added grip. Cam-action hinges that snap firmly into place. There are interchangeable lenses available but must be ordered separately.