In the summertime, sunglasses are more than just a fashion statement, they're an essential piece of safety gear. They not only protect your eyes from the sun's rays, allowing you see better when driving, walking, cycling, working outside, etc, but, more importantly, they protect your eyes from harmful UV rays and blue light, as well as the the skin around your eyes and preventing wrinkles and "crow's feet." And, since you've got to wear them, it's important to make sure they match the decorum of the event or location your attending, and fit nicely with whatever you're wearing.
Joe from Dappered created this excellent "matrix" of men's sunglasses: along the X-axis, the pairs range from dress to casual, and along the Y, modern to retro. In the center is the new Ray-Ban Wayfarer, which looks good on almost everyone and with nearly any clothing. Joe then provides some affordable secondary and tertiary options for those different occassions - outdoor business meetings, a wedding, sporting event, etc. It's a great guide if you're looking to step up from the $6.99 pair you got at the gas station on vacation three years ago.
Which you are.
The Men's Sunglasses Matrix [Dappered.com]
For more info on sunglasses check out The ManMade Guide to Sunglasses: 5 Stylish Pairs Under $100, and our Men's Style and Fashion board on Pinterest.