This pairing of a suit and a crew-neck sweater is a lifesaver when you need to look like a true expert in men's style. Infuse some much need fun and experimentation into this look with the help of a pair of black leather sandals. There are a ton of ways to look great and get through the heatwave, and that's one of them. And if we're talking casualwear for over-30 gents, this ensemble looks cool on almost any gent.