These Oxigen semi-rimless men's sports glasses are more aerodynamic than your average pair of sunglasses because they don't have rims on the bottom. They don't come in shades that are similar to other pairs of sports sunglasses on the market. This fact is not as bad as you would imagine when you think about these sunglasses. You need to make sure that you are wearing bright colors if you decide that it's time for you to start working out at night. Daytime exercising doesn't require people to wear bright colors, which would be perfect for anyone who wants to wear these sunglasses.