Nature's best. The shell of this comforter combines cotton grown from non-genetically engineered seed and without toxic pesticides and synthetic fertilizers, and Tencel lyocell - a natural and renewable fiber made from wood pulp cellulose. Nothing breathes as well as 100% pure cotton, and Tencel lyocell has a silky, sensuous texture and moisture-wicking qualities. This comforter provides superior comfort and a great night's sleep to environmentally conscious users.