These Notre Dame Fighting Irish 2021 Chicago Shamrock Series HydroFX speed mini helmets are the best collectible to own.The Speed Mini Helmet is a half-scale replica of one of the most popular new helmet introductions in Riddell's history. It's a must-have for the serious collector. Includes interior padding and a 4-pt. chinstrap. Official colors and decals. Ideal for autographs. Approx. 5' tall.