11/11/11. The date marking the international debut for this luxury men's underwear brand. Founded by James. A. Christopher (JAC), it is a up-and-coming brand with a distinct sense of humour and is hinted to rival the quality and popularity of Calvin Klein's and Armani underwear. The brand has three main collection - Loyal, Supersmart and Barking Mad - which ranges from classic comfort to fashion forwards underwear. And with their first concept store opened recently in Hong Kong's stylish Sheung Wan district, this brand is heading for big places - so keep your eyes peeled and be the first to own Jac5 Underwear.