TOKYO (AP) — Australian canoeist Jessica Fox found a perfectly stretchy, waterproof material for a boat repair at the Tokyo Olympics.

A condom.

Fox won a bronze medal in women’s kayak slalom and gold in the canoe slalom.

She posted a video on social media this week of someone making repairs to the nose of her boat. A gooey carbon mixture is first applied before the condom is used to secure it in place. The caption reads “Very stretchy. Much strong.”

The 27-year-old Fox is the world’s top-ranked paddler in canoe and kayak and won the first women’s canoe slalom race in Olympic history.