Thank you for looking ☆ Achieved the beautiful luster, texture, and luxurious feel of silk with a highly durable 100% polyester fabric. This pillowcase is made with a carefully selected low-friction fabric generously infused with three moisturizing ingredients (marine collagen, shea butter, and rosehip). It is smooth and gentle on your hair and skin. It can be easily machine washed, so you can use it cleanly at any time without worrying about the disadvantages of silk (prone to yellowing, weak to water, weak to friction, concerns about moth damage and mold). Easy-to-use and non-slip zipper type (fits 43x63cm pillows). Low-friction fabric for effortless beauty while you sleep. Delivers luxurious and comfortable sleep. 59-57