Large Side Air White Pro 20 Side Air Pro20 SA2020 White Large Helmet features: Side Air Inlet Design Uses Standard 1.250" Hose Air Flows From Left To Right Across Face shield Hans / HNR M6 Threaded Inserts In Shell  Composite Shellâ Expanded Polystyrene (Eps) Liner Comfort Fit Blended Nomexâ® Interior Distortion Free 3mm Polycarbonate Low Fog Shield Great Peripheral Vision Silicone Eye port Seal Keeps Out Dust &Amp; Dirt Kevlarâ  Chin Strap Fire Retardant Paint & Amp; Interior Aluminum Pivot Kit W/Adjustable Friction Lock Tear-Off Posts Hand Ratchet To Eight Positions Slick Aero Design With Chin Spoiler