Bauman Collective Silk Pillow cases guarantee the most luxurious beauty sleep. No more puffy, dehydrated skin and hair! Allow your skin to breathe and wake up with frizz-free curls and decreased fine lines and wrinkles. Our silk is natural, resistant to dust-mites, and is hypoallergenic. FABRIC Made with the highest quality 100% Pure Mulberry Silk Pillowcase / 22 momme thickness. Care Instructions For maximum longevity, it’s important to understand that silk is a natural fibre and needs to be maintained with proper care. Hand washing is ideal however not entirely necessary. Machine wash on cold or cool. Do not use water above 30 degrees celsius as it can change silk drastically. Avoid harsh chemicals like bleach as this will change the properties of the silk. A neutral PH Laundry detergent is best. We recommend detergent specified for silk. Pillow cases are final sale