suomi
Sunglasses category : How to choose the darkness what suite to your activity.
Category 0 – 80%-100% transmission – for fashion, indoor use, or cloudy days
Category 1 – 43%-80% transmission – low sun exposure
Category 2 – 18%-43% transmission – medium sun exposure
Category 3 – 8%-18% transmission – strong brightness, light reflected of water or snow
Category 4 – 3%-8% transmission – intense sunshine for high mountains, glaciers; not for use when driving or on the road.
