A dark green check wool blazer and black chinos are an easy way to introduce extra sophistication into your casual styling rotation. Give an elegant twist to your outfit by slipping into a pair of dark brown leather double monks. When you have one of those dreary autumn days, sometimes only a kick-ass getup like this one can get you to face the outside world. And if we're talking dressing ideas for gents in their 30s, this combo suits almost any man.