"We needed fearless spokespeople to show just how laid back you feel when you’re wearing Bonds undies," Tanya Deans, president of Bonds Australia, told WWD.

Son of Crocodile Hunter Steve Irwin, Robert Irwin, is ditching his khakis and showing off his skivvies for Bonds underwear. He explains why he wanted to do it — and how he worked hard to get in shape for it!