1.COPPER TECHNOLOGY: This copper pillowcase is made from 100% copper oxide fiber. Copper is the important microelement to balance people??s metabolism, keeps fabrics fresh and protects against inflammation, protects face skin clean and clear, and delays the process of aging.2.BETTER FUNCTION OF COPPER PILLOWCASE: Renew your skin while you sleep and wake up to younger-looking skin with this copper pillow cover which is infused with smart copper technology that is clinically proven to visibly reduce the appearance of fine lines and wrinkles and promote smoother hair after overnight use.3.MATERIAL: This pillowcase is made from 100% super soft, comfortable silky like, breathable, skin-friendly copper frbrics. Hidden opening helps it be more convenient to be used. Hand washing or machine washing are avaible, hand washing may last its service life. Enjoy a nice night starts from our copper pillowcase.4.CARE FOR YOUR SKIN AND HAIR: When you sleep on the pillowcase, your skin and hair contact directly to the pillow cover, it will release copper ions to your body through your face skin, gradually improve your skin and hair, keep your away from inflammation, delay process of aging, and give you a better sleep.5.EVERYONE NEED PILLOWCASE: Choose a pillow cover that is not soft touch, but keep you healthy life. We promise, return for a full refund if not completely satisfied within three months of purchase.?And please contact us via email if you have any other questions about product.