One of the coolest ways for a man to style a crew-neck t-shirt is to marry it with blue shorts for an off-duty outfit. Feeling creative? Change things up a bit by finishing with a pair of aquamarine athletic shoes. A knockout getup like this one is just what you need when real summer weather settles in. This pairing is a great inspiration to anyone who had doubts about donning casual outfits as a guy over 40.