If you don't take fashion too seriously, go for laid-back and cool style in a white crew-neck t-shirt and grey chinos. Flaunt your mellow side by rounding off with a pair of tobacco leather flip flops. Needless to say, it's easier to work through a super hot summer day in a easy and breezy outfit like this one. This combination is a big inspiration to anyone who wasn't sure about wearing casual outfits as a mature gentleman.