The "most waterproof material ever" has been created by engineers in the US.
Lotus leaves were thought to be one of the most splash-proof materials in nature because water bounces off them quickly.
But engineers have made a new material with tiny ridges that repels water up to 40% faster.
To make material waterproof you have to stop water sticking to it and the team found ridged materials make water drops break up and bounce away faster.
Similar ridges are found in nature on the wings of the Morpho butterfly and the veins of nasturtium leaves.
The new "super-hydrophobic" material could be used to keep clothes, tents and even planes dry.