Thank you for considering this product. This is the Muji Silk Blend Pillowcase, 43x63cm, in the color "Natural". This pillowcase is made of soft, 100% cotton in a gentle white color, designed to support comfortable sleep. The silk and rayon blend provides a smooth texture, reducing friction against your skin and hair. Color: Natural For 43x63cm pillows Materials: 90% Rayon, 10% Silk I have used this for about a week and have home-laundered it. I couldn't find any noticeable stains or damage, but please understand that this is a used item and has been stored by an individual. It will be shipped via the anonymous Rakuraku Mercari delivery service.