The Sisi Silk Pillowcase - Blue BotanicalWe couldnt get enough of this best selling Nap Dress print so we made it in bedding, too! Sleeping on Sisi Silk helps your skin retain moisture, while protecting against hair breakage and frizz. Sisi features the same clean piping as our best selling Savile collection, but in 22mm Mulberry Silk. Sisi has a subtle zipper closure to keep your pillow from escaping.