Of course I use 100% cotton - but, I also consider the tightness of the weave, the weight, and the finish. Some finishes wash repeatably well, others do not. If I wanted to buy some, I'd purchase a small amount and go home to wash and dry it several times. Mark a ruler on it with permanent ink to find out how much (if any) it shrinks. If it looked the way I wanted, I'd rush back to the store!