The revolutionary SCOTT Couloir is designed to shine for all vertical endeavors, up or down. The Couloir, which adheres to both ski and mountaineering safety standards, is a versatile helmet for those seeking protection in climbing and skiing. Features: - ABS Top shell, PC in-mold with EPS liner - Dual standard (ski and mountaineering) - G-Vent System on front - 14 passive vents - M-R.A.S Fit System - Lamp fixation - Meets CE EN 1077 and EN 12492 standards Size Chart: - S: 51.5 - 55.5cm(20.3 - 21.9in) - M: 55.5 - 59.5cm(21.9 - 23.4in) - L: 59.5 - 61.5cm(23.4 - 24.2in)