The Anti-aging Satin Pillowcase. Dedicated to reducing sleep wrinkles and hair frizz, plus are a dream to sleep on! Made from 100% Polyester Satin. Machine washable, tumble dry. Features a stay-put pocket flap (Keeping the pillowcase in place while you sleep). Helps maintain the healthy moisture balance of hair & skin. Extends the life of hair and eyelash extensions.