NIKE EV0934-001 Trainer sunglasses black/volt, grey w/Silver Flash 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.