Ripple Junction Firefly Serenity Valley Adult T-shirt-Black Brown and Black are 100% Cotton, Heather Brown is a Soft Cotton/Polyester blend. Machine washable. "Preshrunk" makes the fabric less likely to shrink, but it doesn't mean it won't shrink again, so dry low or air dry. 100% cotton Machine washable You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!