Awesome sunglasses, love Serengetis. These are polarized and have a purpleish tint. The clarity is amazing and contrast is awesome. When looking at the sky the blue is darker blue and the clouds are whiter causing a nice contrast. Keep in mind polarized glass such as these will distort screens making them very difficult to read. But these are great for outdoor events, they take glare off cars and buildings and take reflections off the water so you can see clearer. I have other non-polarized serengetis for flying.