We both need cotton sheets and pillows/cases due to sensitive skin and allergies. These cases have fit the bill perfectly, surviving multiple washings in hot water while showing no signs of fraying, shrinkage or wear. They are also by far the least expensive 100% cotton pillow covers we could find which makes them absolutely the best value. Be careful when buying cases labeled as cotton to make sure you are not actually getting a cotton blend - these are actually 100% cotton.