You'll be surprised at how very easy it is for any gentleman to put together this off-duty ensemble. Just a crew-neck t-shirt paired with white chinos. Rounding off with a pair of dark green derby shoes is an easy way to add some extra fanciness to this getup. You actually can keep your cool under the oppressive heat, and this outfit is hard proof of just that If you're wondering how you should dress as a 40-something guy, this combination is a good source of inspiration.