The EXO 391 is ECE 22:06 and one of the latest full face helmets to come from Scorpion. The first noticeable feature is the rear spoiler which has been aero-tuned to reduce lift & designed to work with the ventilation system to create a vacuum and maximize airflow. This helmets visor is prepared for a Maxvision Pinlock which fits perfectly into the specially depressed area of the visor.KWIKWICK2 is an anti-microbial fabric internal liner that keeps you cool and dry in warm weather, warm in cool weather.Inner liner is easily removable and washable to help keep the helmet smelling and feeling as fresh as the day you purchased.Micrometric Automatic chinstrap buckle for quick release and precise adjustment.Adjustable vents on the front and rear of the helmet combined with the aero-tuned rear spoiler helps to reduce lift while offering maximum levels of airflow throughout the helmet.On the inside of the Scorpion EXO 391 helmet there is a KWIKWICK2 liner that is machine washable, soft and re