A mustard turtleneck looks especially classy when worn with a navy suit for an ensemble worthy of a real gent. Opt for a pair of brogues for extra style points. Rest assured, this ensemble will keep you toasty as well as looking on-trend in this summer-to-fall weather. As you're transitioning from your 20s to your 30s, you probably want to start dressing in a more elegant manner. If that's the case, ensembles like this are ideal as inspo.