Costa Del Mar Trevally 580G Polarized SunglassesCosta del Mar Trevally Sunglasses were specifically designed for fishermen! These frames have a larger fit and are available in several frame lens combinations. The Costa Trevallys feature Costa's 580G glass lenses, which are extremely clear, blocks 100% UV rays, blocks some blue light to eliminate haze and eliminates yellow light for superior colors. Like all Costas, the lenses in the Trevally sunglasses are polarized. These lenses are Costa's best