Polarized lenses cuts down surface reflections, significantly reducing glare, eye fatigue resulting from it. It increases visual acuity and enhance visual performance, which improves contrast and sharpness in your vision.it is very useful when you are fishing, driving and doing outdoor sports. UV400 Protection Coating blocks 100% of harmful UVA & UVB rays. Visually restores true color, eliminates reflected or scattered light.   Nylon polarized lenses are optically exceptional with an unmatched clarity with very little distortion and with maximum light transmitting capabilities. The CAT.3 is dark lens like grey, amber, green-grey and revo coating lenses, they are suitable for use during daytime. The CAT.2 is light lenses like yellow and copper which are suitable for cloudy day, evening and night use.   All Guideline polarized sunglasses comes with hardcase & cleaning cloth. Experience glasses comes in a hard zippered case with a high-tech ´kevlar´ exterior look.