Belledorm Premium Blend 500 Thread Count Oxford Pillowcase, Platinum. This pillowcase is made from a premium soft blend of 67% cotton and 33% polyester, offering the natural benefits of cotton and the easy-care properties of polyester. It features a sateen weave for a silky soft feel and is easy to wash and maintain. The high thread count blend combines the luxury of cotton with the benefits of being easy care, remaining wrinkle-free wash after wash.