The origins of Saint James Breton shirts and jerseys. In its more than 130 years in business, the Saint James brand has evolved from a workshop supplying sweaters to making the iconic wardrobe staple known as the Mariniere or Breton shirt, to delight local Breton fishermen in the sometimes harsh weather. Stay warm while working in the sea. Although it has changed over the years, the brand remains grounded in its tradition of old world craftsmanship.