A denim shirt and a tank married together are a match made in heaven for guys who love laid-back and cool styles. To give this outfit a more laid-back spin, why not complement this look with a pair of dark green athletic shoes? You know when it's baking hot outside, sometimes only a easy and breezy outfit like this one can get you through the day. This combo should inspire anyone who had doubts about donning casual outfits as a 50-year-old guy.