This combination of a blazer and a v-neck t-shirt is indisputable proof that a safe casual outfit can still look really interesting. Why not take a classic approach with shoes and complement this outfit with dark brown leather loafers? So as you can see, it's super easy to look stylish and stay warm come cooler days, thanks to this outfit. If you're in your 20s, take cues from looks like this to take a more serious approach to your personal style.