The 509 Tactical 2.0 Enduro Helmet offers the latest in technology and safety from our bestselling Tactical Offroad Helmet family. Innovative features for optimal airflow and comfort combine with industry-leading safety and performance to make this the greatest deal going in dirt. Its unique performance includes Venturi Venting with shutters you can open or close to create negative pressure that pulls moist air out for uncompromising comfort and visual clarity.