Wash in cold water with pH neutral soap, no bleach, on a gentle cycle. Wash silk separate from other items(or put them in a mesh bag) and do not overload washer to avoid any unnecessary wear to the fabric. Do Not run them through a dryer(Tumble dry on very low heat for a short time only if necessary.) as silk is not heat resistant, lay them on towel on a sunny window sill, they will dry fast.
Hand Wash:The preferred method is hand laundered in cool water with pH neutral soap using a gentle hand movement. Do not soak too long. Rinse in cool water and roll silk in a towel to remove excess water. Never wring water from silk. Hand washing is much easier and in fact faster.
Sleeping on mulberry silk pillowcases not only makes your skin look better and younger over time, but helps you stay cool during the warmer months and warm during cooler months.