Duvet shell & lining: 100% organic cotton. Organic cotton is a healthier choice for your home and the environment. Certified to the Organic Content Standard (OCS). STANDARD 100 by OEKO-TEX® Certified: tested for 350+ harmful substances. Duvet Cover: Button closure; four interior corner ties keep it in place. Shams: Envelope closure. Made in a Fair Trade Certified™ facility, benefiting the workers who make it. Made in China.