Nano-tex is a new kind of fabric that has amazing water and stain repellant properties. Liquids bead up on its surface and roll right off. We do not have much information about how this nanotechnology works because it is a trade secret. Companies want to get the most money out of their invention so they do not give away the details to would-be competitors. The Nano-tex website tells us the following:
Nano-tex fabric resists oil, water, mustard, and grape juice.
Although we don’t know exactly how the fabric works, the beading up of liquid on the fabric is similar to the lotus effect, pictured below.