The two Aussie siblings teamed up with the brand and Lucas Rangel for the fun vid, which has Cody stripping his shirt for a slip-and-slide.
Cody and Alli have both been rooting Team Australia on at the 2016 Rio Summer Olympics.
So far, the country has picked up 24 medals, with seven of them being gold.
Check out the vid below!
Slide Marathon feat. Cody Simpson, Alli Simpson & Lucas Rangel