Costa Del Mar Hammerhead 580G Mirror Polarized Lens 63mm Sunglasses - Black/Green Green frame glass lens polarized Lens width: 63.8 millimeters Comfortable extra-large fit. Optical spring hinge. Durable co-injected nylon frame. ; Glass lenses have the greatest clarity and are scratch resistant. Includes hard case. 100% polarization kills reflected glare and reduces eye strain. ; 100% UV light blockage for max protection.