I don't recall the info stating there was polyester in the sheets. I don't buy sheets with polyester. This set is 45% polyester, I hope it doesn't "pill up". When I opened the package there was a prominent bad smell on the sheets which surprised me. I washed them and that took care of the smell. Not sure how they will hold up but I'm going to give them a try. I liked the color and pattern so I kept them.