Description of Smith Hustle Skullcandy Audio Helmet Designed to blend the clean styling of the Holt and the technical performance of the Variant Brim, the Hustle encompasses both directions to meet all of your desires. Features: Bombshell ABS Construction AirEvac 2 ventilation maximizes goggle and helmet airflow to reduce fogging and control temperatures Low-profile Regulator with 3-stage adjustable ventilation for easy climate control on 8 vents Airflow control with removable vent plugs on the 8 side vent X-Static performance lining eliminates odor, regulates temperature, and minimizes static (Cocona fabric used on Evolve model) Helmet Fit System (HFS) ensures a correct and comfortable fit Standard audio jack drivers built into earpieces Lifetime warranty