Sunglasses are one of the easiest ways to instantly alter your look without changing your clothes or blowing your budget. You can choose to look sporty, trendy, or devastatingly handsome with a quick swap of shades. Aside from fashion, sunglasses also functionally protect your eyes from the sun—a requirement on a tropical vacation. So which pair (or pairs) should you choose? We’ve got all kinds of tips and tricks to ensure that you’ve got the coolest, and best-looking, men's sunglasses around.