Low density layer (LDL) ùQuadCore; soft gel padding for rotational and low-g impact protection Supervent allows us to use larger airflow vents, while maintaining structural integrity Contigo 3 EPS inner layer Anti-microbial, washable comfort pads Vista fit system Locking buckle and sliders Unibody construction Features 21 vents. HELMET BICYCLE UNO MATTE BK/RD S/M