For a look that's nothing less than GQ-worthy, wear a blazer and a tan dress shirt. The whole look comes together wonderfully when you complete your outfit with a pair of dark brown leather loafers. This ensemble is a foolproof option if you're searching for a great, summer-friendly ensemble. As you're moving from your 20s to your 30s, you want to start dressing with more polish. In this case, combinations like this come in handy.