HJC RPHA-10 Cage Full-Face Street Helmet (Flat Black/Silver/Gray, Medium) Max air-flow top vent: variable air flow is adjusted by glove-friendly dials on each intake vent A matrix of carbon fiber, aramid, fiberglass and organic non-woven fabric create a strong, lightweight shell designed for superior fit and comfort using advanced cad technology Rapidfire shield replacement system provides ultra-quick, tool-less removal and installation for efficient operation; Pinlock-prepared 2d flat-racing shield with included clear Pinlock insert; one-touch open/close locking system for a secure seal Advanced channeling ventilation system: full front to back airflow flushes heat and humidity up and out; advanced wind tunnel testing, resulting in absolute smooth air flow both inside and outside; low wind resistance and maximum ventilation SilverCool Plus interior: premium soft feel with ginkgo extract, moisture-wicking and odor-free interior with advanced silver anti-bacterial fabric; crown and cheek pads are fully removable and washable; meets or exceeds SNELL and D.O.T. Standards