These are very nice glasses, especially for the price. My only real beef is the simple fact they do not come with extra lenses. That said, for the price, get an extra set with a clear lens and you are good to go.

My head and face are medium size and the glasses fit snugly and do not shift position, even coming down a rough hill at speed. They are comfortable and I have had no breakage issues after using them regularly for about 3 months. I would not hesitate to buy again!