100% mulberry silk pillowcases in Grey.Silk pillowcases promote a cooler body temperature while sleeping, can help to keep your skin and hair hydrated, all while minimizing the appearance of fine lines and wrinkles. Breathable, lightweight, crisp hand feel while an Oeko Tex Standard 100 Certification ensures a chemical-free, eco-friendly experience. Standard: 26" x 20"King: 36" x 20"Set of 2 Machine wash up to 30 degrees C gentle cycle. Iron up to 110 degrees .Do not tumble dry or dry clean.