Hey Football Head, nice Nickelodeon Snapback Hat! The Hey Arnold Hat is an all black snapback hat with an adjustable band so this hat can fit just about everyone! The Nickelodeon Hat is made of acrylic wool material that is both comfortable to wear and durable. The Hey Arnold Apparel features brightly colored, bold embroidery of Hey Arnold on the front of the cap. This Nickelodeon Hey Arnold Hat is the perfect gift for fans of old school Nickelodeon cartoons!