Nail the laid-back and cool outfit in a navy cardigan and a long sleeve shirt. Brown leather casual boots will tie your whole look together. During the winter months, when functionality is prized, it can be easy to settle for a less-than-stylish getup in the name of functionality. However, this getup is a vivid example that you totally can stay snug and remain stylish in the winter months. If you're approaching your late 20s, pay attention to combinations like this to add more gravitas to your wardrobe.