KELLY Single Breasted Waistcoat Blue Single Breasted Waistcoats Oliver Brown, London Regular Fit Navy Stripe Waistcoat Buy Online at Moss MAX DOUBLE BREASTED BLACK WAISTCOAT XPOSED MAX DOUBLE BREASTED BLACK WAISTCOAT XPOSED. Marc Darcy Navy Single Breasted Waistcoat This classic navy waistcoat is the perfect way to elevate a casual or formal look. Stand out from the crowd with the modern and striking dual print lining, which bestows this simple and understated design with an added touch of visual flair. With adjustable straps on either side, this piece can be effortlessly styled with its accompanying blazer and a pair of dark jeans for an effortlessly stylish yet relaxed off duty ensemble. *Four buttons for a contrastive fastening.