Dress in a beige cardigan and white chinos for a casual and stylish getup. Add a pair of dark brown leather casual boots to the equation and off you go looking smashing. In winter, when warmth is paramount, it can be easy to settle for a less-than-stylish getup. However, this getup is a vivid example that you totally can stay toasty and remain stylish during winter. So if you need style ideas on what to wear after 30, this ensemble is a wonderful example.