This laid-back combo of a long sleeve shirt and olive cargo pants is a lifesaver when you need to look cool and casual but have no extra time. Why not take a classic approach with footwear and introduce a pair of dark brown leather casual boots to the equation? As you can see here, this combination is seriously stylish and will provide the necessary warmth for getting through the colder months with ease. Men wondering how to stay stylish well into your 30s, you have your answer.