This is at best a polyester mix, if not almost all polyester. There is no way it is 100% cotton. You can literally stretch the fabric a little. You can not do that with 100% cotton sheets that have that tight of a weave. It is no surprise they say not to bleach them, because polyester yellows with bleach. In addition, pure cotton that is not treated wrinkles more. Save your money. It is sad because it seems more and more sheets that are supposedly cotton are not anymore. I do not know if the companies are being taken to the cleaners or they are just pulling a fast one on consumers.
