For a look that's sophisticated and absolutely gasp-worthy, wear a black waistcoat with jeans. A pair of white and blue high top sneakers effortlessly turns up the wow factor of this outfit. Come summer you're looking for a look to keep you fresh and stylish –– this look is just the one you need. As a 30-something gent, you want to start dressing like a grown man. In this case, outfits like this are perfect as inspiration.