 And water can get down underneath that. Now, if it's waterproof, there's probably something in there that's keeping the mildew or the mold from growing, but eventually the water will win, right? Water always wins. Whereas if you have linoleum, and you see the same thing with linoleum, there's a seam there where they cut the linoleum or they cut the vinyl sheet good, and that seam may be as small as your fingernail.