I have owned these sunglasses for exactly one week. At first, I thought the bridge's deep cut looked goofy, but I have grown to like this style. As for comfortability, I cannot complain. The frame is light and soft. I ran a few 5 mile runs while wearing them. I did not experience shake or difficulty running into direct sunlight. The lenses are dark, and they likely cancel out about 50 percent of the sunlight and about 55 percent of the glare. I believe the eyes are not visible without direct sunlight, too. Yesterday, however, the right arm broke off. I was at a pool. It was a hot day. I do not think the frame can handle more than an hour in direct sunlight on a hot day. Nevertheless, however, I recommend these glasses, because their comfortable, soft, light, and dark. If you buy, though, do not let them heat up.