Go for a grey plaid blazer and dress pants if you're going for a clean-cut, stylish outfit. Don't know how to finish off? Complement your getup with brown slip-on sneakers to spice things up. You totally can keep your cool under the sweltering heat. The proof is right here As you turn 30, you want to start dressing like a grown man. If that's the case, combinations like this are a surefire option.