Julbo Dust Performance Sunglasses, 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 Panoramic Lens & frame shape with full venting Curved Wrapping Temples shaped and cut for better hold with sharp and repeated movements Grip Tech soft comfort exclusive material on the temples that does not stick to hair giving perfect hold and comfort Grip nose a supple shock-absorbent insert that adheres to the nose And the ergonomics of the frame are adapted for Asian facial shapes