new silic water repellent shirt

[takethisbread]

this item has been in the news as a new stain proof/ water proof shirt. it was invented by a college student, and is taking preorders. im not a gear head. is this plausible? a waterproof stainproof shirt would obviously have benefits for backpackers. http://www.gizmag.com/hydrophobic-silic-shirt/30208/

[moldy]

Plastic bags are waterproof. It like buying a pig in a poke