You can be sure you'll look handsome and classic in a navy check double breasted blazer and a white dress shirt. A pair of black suede tassel loafers looks perfectly at home paired with this ensemble. So if it's a boiling hot warm weather afternoon and you want to look sharp without putting too much effort, this outfit will do the job in seconds time. This look is most probably exactly what you're looking for as a 40-year-old gentleman.