The Costa Del Mar Saltbreak 400G Polarized Sunglasses won't slip off your face when it counts the most. Even when you have gallons of water in your face and a monster fish on your hook! The Hydrolite co-injected lining on the frame's arms takes care of that, and the overall flexibility of the frame means serious comfort. 400G glass lenses are 22% thinner and 20% lighter than normal glass lenses and are scratch resistant. The Costa Del Mar Saltbreak 400G Polarized Sunglasses push the edge in sunglass performance--so you can push it everywhere else.