Houston Oilers Riddell SpeedFlex Throwback 81-98 Full Size Authentic NFL Helmet. The SpeedFlex helmet has quickly become the helmet of choice by many top NFL players. This Houston Oilers 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 Oilers team colors and SF-2B-SW facemask.