A tank and white chinos are a nice getup to have in your off-duty styling routine. As for the shoes, stick to the casual route with a pair of dark brown suede sandals. There are a ton of ways to look cool and survive the heatwave, and this here is one of them. This ensemble demonstrates that after thirty you have a wide range of outfit options.
Go for a pared down but casually cool getup by combining a tank and white chinos. With footwear, go for something on the relaxed end of the spectrum and complement your getup with black leather sandals. Needless to say, you're looking at a great option for a boiling hot day. This outfit proves that as a 30-something Millennial gent, you have a wide range of sartorial options.