The Giro Xar is the Czar of all-mountain. All-mountain riding demands gear that is versatile: lightweight without sacrificing durability and comfortable enough to ride for four to five hours in varying conditions. The Xar was specifically developed for aggressive trail riding, with features like 17 Wind Tunnel vents with internal airflow channels, the micro-adjustability of Roc Loc 5 and Giro's patented visor to deflect the sun, rain, brush and branches. Even the padding is extraordinary thanks to X-Static fabric. If you're riding bigger, faster and farther than ever, the Xar is fit to roll with you. 315 g. (Med). SM (51-55cm), MD (55cm-59cm) or LG (59-63cm).