This pairing of a charcoal crew-neck t-shirt and grey chinos resonates laid-back attitude and stylish functionality. Play down the casualness of your look by wearing a pair of dark brown suede desert boots. During winter, when practicality is prized, it can be easy to surrender to a less-than-stylish outfit in the name of practicality. But this outfit is a practical illustration that you totally can stay toasty and remain equally stylish during winter. When it comes to casual style tips for 30-something gents, this outfit is perfect.