Reporting back from the "how many linens do we need" thread about the 100% cotton waterproof mattress pad I ordered. Well, it came today, it's wonderful quality, but the tag says 100% polyester! The packaging says 100% cotton, nothing about polyester anywhere. So I went back to BB&B online to read the ad again and I just didn't read carefully enough. It does say it is filled with polyester 80% and 20% rayon with polyurethane backing (as opposed to the tag which says none of those things, just polyester, 100% Ugh. Back it goes.