Thank you for viewing! This product achieves the beautiful luster, texture, and luxurious feel of silk with durable 100% polyester fabric. This pillowcase features carefully selected low-friction fabric infused with three moisturizing ingredients (marine collagen, shea butter, and rosehip). It's smooth and gentle on your hair and skin. You can easily wash it in the washing machine, so you don't have to worry about the drawbacks of silk (prone to yellowing, weak to water, weak to friction, and concerns about insects and mold), and you can always keep it clean. It's easy to use with a zipper closure (compatible with 43x63cm pillows). With its low-friction fabric, you can easily enhance your beauty while you sleep. It delivers luxurious and comfortable sleep. 59-57