Julbo Run Performance Sunglasses with Zebra Lens Zebra lens: NXT material w/clarity of glass, durability of anti-ballistic material, Ultra-light Photochromatic (2-4) Lens with Anti-fog coating Wrap around shape for a good vision spectrum and protection Curved Wrapping Temples shaped and cut for better hold with sharp and repeated movements Sipe Grip Tech Supple, sculpted inserts at the temple ends for excellent hold without sticking to hair Grip nose a supple shock-absorbent insert that adheres to the nose