This menswear style with a grey suit and a white crew-neck t-shirt isn't a hard one to score and is open to more sartorial experimentation. And if you need to easily level up your getup with a pair of shoes, why not add a pair of black suede loafers to the mix? As a 30-something, you want to start dressing more professionally. If that's the case, getups like this are a real lifesaver.