Best for road biking, this in-mold polycarbonate helmet has a streamlined look. With high-quality materials creating the foundation, it lets you adjust to the perfect fit and keeps you cool through 25 vents. . Made out of polycarbonate. . Quickly adjust with the ErgoDial??? Fit system. . Fits heads 21.25 in. to 24 in.. . 25 vents improve air circulation. . Imported. . 768686664786 27738500017 7067684