I don't think you would have to... nothing sticks to it, so in theory you wouldn't have to until the coating comes off. That is, if it was applied right and completely covered the shirt.
sweat wouldn't even stick to it. It says it keeps it clean, dry, and bacteria free, thus it will not get dirty. Unless you only coated the outside, then thats a different story.
Finally!!!! I remember seeing this years ago. I think im going to order a kit see how it goes.
So if someone was to spray enough of this inside and outside of their PC, would it make it water proof?.. enough to sbumerge under water?
So, how to wash a t-shirt treated with NeverWet?