Such essentials as a blazer and a burgundy turtleneck are an easy way to infuse a dash of masculine sophistication into your casual routine. A pair of black leather casual boots will tie this full ensemble together. During winter, when warmth is key, it can be easy to settle for a less-than-stylish ensemble in the name of functionality. This ensemble, however, is a good illustration that you can actually stay comfy and remain stylish at the same time in winter. This getup is perfect for 30-year-old gentlemen.