Surfers quickly noticed the durability of the shorts, the result of Rena's triple-stitching technique. Sponsored contests raised the brand's profile, and by the 1980s Billabong board shorts were everywhere in Australia; by the late 1980s they had reached New Zealand, Japan and South Africa. The name comes from the Wiradjuri word bilabaŋ, a creek that runs only during the rainy season.
Listed on the Australian Securities Exchange in 2000, the company spent the next decade acquiring action-sports labels and retailers, building a stable that has included RVCA, Element and Von Zipper. After a turbulent period it became part of Boardriders, owner of rival Quiksilver, in 2018; in 2009 Billabong was named one of the Q150 Icons of Queensland for innovation and invention.