This sheet set is made from pre-shrunk, European-crafted,100% cotton flannel. Flannel originally comes from Northern Europe, where the chilly climate influenced clothing makers to create a cozy and warm fabric out of cotton. Brushing raises the nap of the fabric, creating the thick, soft, and comfortable feel that is so characteristic of this cloth. OEKO-TEX® Certified. 100% cotton. Machine wash. Made in Portugal.