Iï¿½ï¿½m so stupid. I tought that impermeable cloth meant no water and no air but thatï¿½s not the case, iï¿½ve read about it. So, can you tell me of an air tight soft fabric (so you can make clothes out of it)?? Where can i get it?? Internet?? Yes, itï¿½s for my flatulence filter. Thank you.