Save upto 50% on girls’ swimwear from leading brands when you shop via TopOfStyle. Billabong is an Australian clothing and accessories brand recognized internationally for its premium clothing collection. Gordon Merchant founded Billabong in 1973 at Gold Coast, Queensland, Australia, and today, it is a subsidiary of Quicksilver, owned by Boardriders Inc. Mustard is a spectacular color for stylish persons. It invokes the feeling of joy and peace.