The Scorpion Exo 391 full-face motorcycle helmet features ECE-22.06 homologation and a manufacturer's five-year warranty. Two shell sizes provide excellent aerodynamics with an advanced polycarbonate composite engineered shell, making this ultra-lightweight and durable with an EPS-lined chin bar for additional protection. It is quiet, with an aero-tuned design and wind tunnel tested. It is an EXO-COM Bluetooth kit-ready with a breath deflector and chin cover for superior noise reduction and a fog-free ride. The visor is clear, anti-scratch treated and Pinlock Maxvision prepared. Thanks to the quick-drying material, the KWIKWICK2 lining is removable, washable, hypoallergenic, and comfortable thanks to the quick-drying lining. A full adjustable ventilation system features indexed front and rear vents with an aero-tuned rear spoiler to reduce lift but also creates a vacuum to maximise airflow through the helmet. A micrometric automatic chinstrap buckle gives quick release and precise adjustment.