For an effortlessly neat ensemble, go for a blazer and red chinos — these pieces go nicely together. The whole outfit comes together wonderfully if you add black leather casual boots to your look. In winter, when comfort is the priority, it can be easy to surrender to a less-than-stylish ensemble. However, this ensemble is a stark illustration that you totally can stay cozy and remain stylish at the same time in winter. If you're wondering what you should wear as a 30-year-old guy, this ensemble gives a fair idea.