Costa Del Mar designed the Triple Tail Polarized Sunglasses to help serious big game anglers catch that elusive marlin. Glass lenses prevent scratches and will keep the visual quality of the Triple Tail sunglasses intact for years on the water. These wrap-around glasses utilize Titanum Fused Grilamid, basically the toughest nylon out there, to create a strong, durable frame. Polarized glass lenses fight off glare so you can search for the big one.