This semi-casual combination of a dark brown corduroy blazer and a white dress shirt is super easy to pull together without a second thought, helping you look awesome and prepared for anything without spending too much time digging through your closet. Add a different twist to an otherwise standard look by rounding off with dark brown leather oxford shoes. So if it's a boiling hot summer day and you want to look seriously stylish without exerting much effort, this ensemble will do the job in no time. When it comes to fashion tips for gentlemen in their 30s, this outfit is ideal.