Essentus International Inc, a supplier of business solutions to the apparel, footwear and soft goods industries, announced today that Unionbay Sportswear has successfully completed an upgrade of its enterprise system to Essentus Sourcing and Demand Management 2.1. Unionbay Sportswear, a subsidiary of Seattle Pacific Industries, targets teens and young adults with its moderately priced jeans, overalls, and other casual wear. The company has been operating with Essentus' supply chain solutions since 1999.