Strike King Plus Sunglasses (s) Scientifically engineered lens colors to help clearly distinguish underwater structure and fish Equipped with advanced polarization technology 100% protection from UVA and UVB rays Advanced coatings for greater resistance to scratches Lenses stable in all weather and humidity conditions The SK Plus 06 feature a black frame with blue lens Since 1984 Strike King has been a leader in polarized sunglasses for fishermen. New models include lenses made with APT Advanced Polarization Technology. The benefits over traditional CAB plastic lenses are: greater visual acuity (imporved contract and shapness), a more rigid lens and smooth "state of the art" coating creates greater resistance to scratches and hence better optical performance. Polarization in fishermen's sunglasses is a must and a benefit for most all other uses and all Strike King models are polarized.