The Riddell SpeedFlex Authentic helmet has quickly become the most popular helmet of choice by top NFL players. The unmistakable look of the SpeedFlex has become the new icon of the game. It is officially licensed by the National Football League. It features a comfort overliner, HS4 (high strength spring stainless steel) SF-2BD-SW Facemask, quick release facemask attachments, official team colors and decals and is approximately 10.5" tall. . If a product is unsigned or non game-used, a hologram will not be included. memorabilia. Pittsburgh Steelers memorabilia.