Wear a white and black horizontal striped crew-neck t-shirt and black skinny jeans for an easy-to-wear outfit. Don't know how to complement this ensemble? Wear black suede slip-on sneakers to class it up. When hot weather hits you want to feel fresh and seriously stylish –– this outfit is just what you need. Ideal if you're scouting for some amazingly inspiring casual style for guys in their 30s.