This combination of a mustard shawl cardigan and a crew-neck t-shirt is on the casual side but also ensures that you look on-trend and seriously sharp. Put a different spin on an otherwise simple getup by rounding off with a pair of burgundy leather loafers. As the weather gets warmer, it's time to shed those bulky winter gear and opt for an ensemble that's lighter, like this one here. After 30, you want to start dressing more like a mature gentleman. That's when looks like this are a winning option.