Robert Irwin is showing off down under.

The 21-year-old son of the late Steve Irwin and Terri Irwin rocked nothing but his boxer briefs in a new underwear campaign for Australian clothing Brand bonds. As seen in photos shared April 3, Robert bared his rock-hard abs as he posed with—what else—snakes, spiders and lizards.

“Proud to celebrate Australia’s most iconic animals,” he wrote on Instagram, “and the most iconic underwear!”

Needless to say, jaws fell to the floor.

“I have nothing appropriate to say,” one fan quipped in the comments section, while another joked, “Chill bro, my wife’s on this app.”

And given how Robert is often seen in his family’s signature khaki zoo uniforms, many were surprised by the scantily-clad nature of the photos.

“Oh my God! Is the world ready for this side of you Robert Irwin?!?!” a third Instagram user commented. “Not saying that you don’t look great, you look amazing mate!!!”