This classic and casual combination of a blazer and a dark brown v-neck sweater takes on different nuances depending on the way it's styled. Complete your look with a pair of burgundy leather casual boots and ta-da: this look is complete. In the colder months, when warmth is critical, it can be easy to settle for a less-than-stylish look. However, this look is a stark illustration that you totally can stay comfy and remain stylish at the same time during the colder months. Semi-casual getups for stylish 20-year-old men aren't actually that hard, as you can see here.