NIKE EV0939-001 cross Trainer P sunglasses matte Black/Silver, polarized grey lens features NIKE max optics lens technology for precise visual information at all angles of view. These cross Trainer sunglasses have a lightweight 8 base injected frame design. The auto-adjusting ventilated nose bridge is for a customized fit and added grip. Cam-action hinges snap firmly into place. Interchangeable lenses are available, but must be purchased separately.