Most people recommend dry cleaning or hand washing silk, however there are other options that make caring for your silk pillowcase easy to maintain. The Momme is the density of your silk and if it is higher than 20 it is safe to wash in the washing machine. You don’t want to wear out the natural silk fibers so if washing it in the machine do not use hot water. Keep the temperature below 63 degrees. Before putting the pillowcase in the washer, turn it inside out and toss it in a mesh bag. Also use a mild laundry detergent. The best way to dry your pillowcase is air drying. Don't wring out the excess water by hand before hanging it to dry as that will encourage wrinkles. If you are ironing the pillowcase make sure your iron is set on the silk setting.