50% cotton/50% modal. The cotton is certified organic. TENCEL™ Modal is sourced from certified forests and is produced by using renewable energy and by recovering the process chemicals. It is a good sustainable choice. The dyeing and printing processes are certified as compliant with environmental standards. Delicate wash at 40°. Gently stretch to length while damp. Do not tumble dry. 3-4% shrinkage. Made in Sandanski, Bulgaria.