Macstone Technologies Co., Ltd.is an investment and registeredenterprise of Singapore Group Corporation .lt has been established for 15 years . lt has a dedicated design team in Singapore responsible forproduct design , products production and sales are in China . The groupowns multiple brands , such as Viva , Unig , ZuckBear and the brandSanta Barbara Polo & Racquet Club , which are licensed for productionand sales from the United States.