About this item?? SKIN CARE PRINCIPLE – When the skin comes in contact with a pillowcase, copper fibers begin to release copper ions, and some of the copper ions are absorbed by the skin and enter the basal cells and participate in collagen production. There is also a large amount of copper ions left on the pillowcase to form a clean environment, protect the health of the skin and reduce the formation of acne muscles. Started to make anti-aging skin SPA for the skin automatically, promote cellula?? MATERIAL: 99.99% Pure Copper + Polyester. It’s clinically proven to Copper can relieve arthritis pain, reduce muscle tension, improve blood circulation, better sleep, helps reduce odors and so on.?? Size: 18.5??W x 27.5??L. Machine-washable, DO NOT BLEACH, safe and non-irritating. Color and anti-aging technology proven to last over 100 washes.?? Copper is closely related with hypertension. It’s beneficial for us to prevent hypertension to use copper pillowcase, doctor adviced. In addition, it effectively alleviate pain, reduce inflammation and improve blood circulation. providing proper support to your head, neck & shoulders all night long.?? 100% AFTER-SALE SATISFACTION: return for a full refund if not completely satisfied within three months of purchase. Any question you have, pls feel free to contact us by e-mail and we are always at your service.