As you can see here, looking casually classy doesn't take that much work. Pair a blue blazer with charcoal chinos and be sure you'll look incredibly stylish. Demonstrate your laid-back side by finishing off with red plimsolls. As you can see, this ensemble is a really great idea, especially for in-between weather, when the temps are dipping. Perfect if you're in search of some amazingly inspiring casual style for 30-year-old gentlemen.