SIZE – The NASA Hat is able to easily fit most sizes with the snapback feature. MATERIAL – The NASA Snapback Hat is made of acrylic wool material that looks and feels great. OFFICIALLY LICENSED – The NASA Snapback is officially licensed and 100% authentic. EMBROIDERED PATCH ART – The NASA Patch Hat features several detailed, bold patches embroidered across the cap of the hat. NEW SHAPE – The NASA Apparel features a unique, curved bill, snapback shape you won’t see anywhere else!