ABS hard shell: Robust helmet made of EPS foam and injection molded outer shell; High visibility: High visibility due to reflectors; Bug mesh: Full protection from insects; Ponytail compatibility: Perfect fit for people with long hair; Full-ring: Adjustable ring connected to adjustment system enclosing all of the head; XL Size Large helmet sizes available (62+ cm); Excellent ventilation with 5 air inlets and 8 air outlets; Zoom Ace Urban: Finely adjustable adjustment system with handy adjustment wheel for customisable fit; Large, highly mounted and integrated LED tail light with 180 degrees visibility