A double-breasted waistcoat is a great way to bring a new focal point to your tailoring and breathe new life into your arsenal of suits. Let David Gandy and Jim Chapman's LCM attire be your guide.

The waistcoat seems to have become one of those pieces that strike men as more hassle than must-have. Sure, a three-piece suit suggests formality and attention to detail, but it can also appear ...