Strike King's SK Plus sunglasses feature TAC (Tri-Acetate Cellulose) polarized lenses specially designed for unrivalled performance. TAC lenses are stable in all weather and humidity conditions and will never compromise on optical quality. The scientifically engineered lens colors will enhance the human eye's ability to clearly distinguish underwater structure and fish, while improving sharpness and contrast. SK Plus sunglasses feature APT (Advanced Polarized Technology) which blocks 100% of human UVA and UVB rays, protecting your eyes from the sun. Advanced coatings provide a clearer, undistorted image. The ribbed lens features advanced coatings that give the lens greater scratch resistance while enhancing optical performance. See for yourself!