I don't know how it could be called rubber sheeting and still be listed as 100% cotton, so, I'm with you on that. What does it say on the end of the bolt?, or are you just looking on line? Ask for the phone number of Joann's corp office. That you need to speak to someone in the buying office that handles Utility fabrics, and that can tell you exactly what is in this. That you need to use it for children and you need to know if it safe. Joann's coporate office is located at 5555 arrow Road, Hudson, Ohio 44236. The FTC information is supposed to be on the end of the bolt..