ONE SIZE: This unisex ball cap features an adjustable buckle closure on the back to allow for easy resizing to accommodate a wide range of adult men and women's head sizes 100% COTTON: This soft cap is composed of 100% lightweight and durable cotton material to allow for instant comfort when worn, and features a curved hat bill to provide protection from bothersome sun light while doing outdoor activities or out walking on a nice sunny summer day HAND WASH ONLY: Harry Potter baseball caps are recommended for hand washing only, lay flat to dry, do not