There’s something about his cane that contributes to his elegance as well. Benjamin Disraeli wrote his mother from Spain in the first half of the 19th C that he had two canes, one for morning, one for evening. He also carried a fan.
That is a beautiful suit, it looks like flannel, the colour is lighter than navy and is it cut to perfection across his shoulders. The cream shirt takes the formal edge off the look. His open smile takes it to the next level.