FEATURES: Riddell(R) Speedflex Optimized: Provides the best fit possible with Speedflex football helmets Anti-Fog: Manufactured with AFR Lens-Treatment for anti-fog performance and improved scratch resistance PhysioMorphic(TM) Geometry: Allows the shield to take the shape of the unique curvature of Riddell(R) Speedflex Helmets and Facemasks while maintaining optical clarity Prizm(TM) Lens Tech: Designed to enhance color and contrast so you can see every detail Easy Installation: Twist-on installation and precision snaps eliminates the need to use tools