Have tested in all weather these glasses. Even when it is snowing, and even in total darkness the best view. Even in bright sunshine is no aperture determine. Absolute top product, I'd recommend it to anyone who does not want to constantly change glasses. This glass can be seen every contour in the snow. Even if it is very cold and you go fully disguised, the glass from fogging. Would I buy again at any time. Investment has paid off.
