Costa Del Mar Hamlin 580P Polarized SunglassesCosta Del Mar Hamlin 580P Polarized Sunglasses are great fishing sunglasses! The Hamlin is constructed of TR 90 nylon that is lightweight yet rugged. Costa has added Hydrolite to the sides and nose so these glasses will not fall off your face, even in a heavy rain. The 580P lenses give you brilliant colors with amazing clarity. They also block 100% of UV light and are polarized to reduce glare and eye strain. Costa Del Mar Hamlin 580G Polarized