This detail is so named for the top of the lapel which juts out at an angle, reminiscent of a – you guessed it – mountain peak. Although the peak lapel has been through a variety of generations and trends, its angular forms all have one thing in common: they’ve always been viewed as fancier than their conventional notch counterparts. Perhaps that’s because they’re less common — and for good reason: the peak lapel is considerably more difficult to make, and therefore more exclusive.
Unlike the notch lapel, which is rarely seen in formal evening wear, a peak lapel is an equally respectable choice for your tux and your business suit, and it’s virtually the only lapel you’ll see on a double-breasted jacket. In addition to adding an extra element of je ne sais quoi, the peak lapel is a great and subtle way to optically broaden the shoulders and slim the waist.