We have purchased this product for our own use, for a condo rental,, and for gifts. They have the feel of excellent quality and they wash beautifully. Our temperapedic mattresses are only 10 inches thick, so we cannot answer to thicker mattresses; however, there is quite a bit of room to spare. The sheets are generous and make bed-making easy. We have used them for a few years, and they are still like new.