These men's X-Loop flash mirror lens semi-rimless sports sunglasses are the right choice for anyone who needs to protect their eyes when exercising. When someone wears sunglasses in their day-to-day lives, the way that shades look doesn't matter. You could wear the bulkiest glasses imaginable and get away with it as long as they go with your outfit. The same can't be said when you want to work out in the sun. If you decide that you want to wear something that's not aerodynamic, you will find that your ability to move quickly is no longer present.