The description stated this was “ A unique blend made of 54% cotton and 40% polyester and 6% modal. With this unique blend,”.  What I received was a 100% Cotton sheet. Following the instructions, I washed the sheet, then put in on the bed at which time I noticed that the product was rough and stiff.  Upon further inspection, I discovered that it was 100% cotton. Definitely not sateen, cotton and polyester blend. Needless to say, a very hot and rough, not to mention  sleepless night ensued.