Strike King Plus Kulik Polarized Sunglasses 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 SKP20 features a black revo frame with mirror charteuse 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