Try pairing a charcoal double breasted blazer with grey dress pants if you're aiming for a neat, trendy outfit. And if you want to effortlessly tone down your outfit with a pair of shoes, why not complete this look with a pair of tan leather double monks? It's is an obvious choice if you're on the hunt for a cool look that transitions easily into fall. As you can see here this combo is something you can totally wear as a guy in his thirties.