For a look that's sophisticated and envy-worthy, consider teaming a white short sleeve shirt with white dress pants. Complement this outfit with brown suede loafers to completely jazz up the look. As you can see here, it's extremely easy to look stylish and stay comfortable when cooler weather comes, thanks to this outfit. As a 30-something gentleman, you probably want to start dressing more maturely. In this case, ensembles like this are ideal as inspiration.