Granted, it’s not often that comfort, charm and chic come together in a Venn diagram of desirability. But, nestled firmly in the Reuleaux triangle this season is the puffer jacket. If you have so far managed to resit the down-filled pull of one of these splendidly warm, surprisingly versatile magic puffs, then start saving: there are so many glorious iterations on the market that it’s time you caved.