I wear glasses, so Tandem glasses in front of flat. My friends come with the glasses super kar. The looks so well as a sports glasses from Carrera. I'll personally with the 250-ger better clear. Which is close to the side and sits better with me. From the function are both great. However, it seems to me the 250-strength slightly lighter. Either way, you always need a pair of glasses more for a cozy DVD night when friend are there. I think the great glasses and chic.