As I looked at my Great Offer Stock account, I realized I've ordered this same set, hemstitch, 400 thread count sateen solid cotton, three times ( in different colors) over the years. All of them are still in use, in good condition. I haven't had any trouble with the fabric pilling. I won't buy sheets that are not solid cotton, and I like thread counts of at least 400. This last set, which I bought in white, to go with a new duvet cover, do not disappoint. They're smooth and comfortable.