Houston Texans Riddell SpeedFlex Full Size Authentic NFL Helmet. The SpeedFlex helmet has quickly become the helmet of choice by many top NFL players. This Houston Texans SpeedFlex helmet is the most authentically-inspired collectible in our line! Complete with comfort overliner and quick release facemask attachments, the unmistakable look of the SpeedFlex has become the new icon of the game! Comes in official Houston Texans team colors and SF-2B-SW facemask.