Sleep Happy with our 100% Mulberry Silk Zipper Pillow Case, 22 momme, one piece. Happy Hair. Happy Skin. Happy Sleep. Our Mulberry Silk Pillowcase, 22 Momme - Oeko-Tex Certified, offers the ultimate combination of comfort, quality, and sustainability. It's the perfect way to pamper her and show your appreciation this Mother's Day. Oeko-Tex, Standard / Queen Size, 22momme Caring for your pillowcase Machine wash (gentle cycle) or hand wash with cold water with a detergent suitable for silk. Always line dry and if you would like to iron make sure it is inside out and kept a little wet. They make the perfect gift for any holiday! Stocking Stuffers, Christmas, Birthdays, Anniversary, Gifts for mom. Corporate gift.