If the occasion calls for an elegant yet neat menswear style, go for a dark brown blazer and black chinos. Finishing with a pair of black leather chelsea boots is an easy way to bring an extra dose of class to your getup. In the winter season, when warmth is top priority, it can be easy to surrender to a less-than-stylish outfit. This outfit, however, is a good illustration that you totally can stay cozy and remain equally stylish in the winter season. So if you need style ideas on how to dress as you turn 30, this outfit is ideal.