Fit & Design: Performance sport fishing sunglasses Side shields and hooding help keep light from leaking in and offer maximum coverage Vented and fully-adjustable nose pads offer a customizable fit Sweat channels and eyewire drains help keep your vision clear Metal keeper slots 580G Lightwave Glass lenses provide superior clarity and are scratch-resistant Encapsulated mirrors between layers of glass are scratch-proof 20% thinner and 22% lighter than average polarized glass Technology: Polarized lenses protect against UV rays and filter out unwanted glare New stickier Hydrolite(R) nonslip, hypoallergenic rubber helps keep frames secure Additional Details: The slimmed-down brother of the Costa Del Mar(R) Blackfin PRO Manufacturer Limited Lifetime Warranty