Front: 52% organic cotton, 48% TENCEL Lyocell.Back: 100% organic cotton.Duvet Cover: Button closure; four interior corner ties keep it in place.Shams: Envelope closure.Front: 280-thread-count; back: 200-thread-count.TENCEL is a Lyocell fiber sourced from responsibly managed forests. Its sustainable, closed-loop process has a recovery rate of more than 99%.Made in a Fair Trade Certified facility, benefiting the workers who make it.Made in China.