Sure the Costa Del Mar Fisch Blackout Polarized Sunglasses look good, but it's how they make things look that will make them indispensable when you're out on the water. The scratch and impact resistant 580P lenses cut glare and enhance clarity so you'll never miss that tell-tale flash of silver just below the surface. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.