The wildly popular Armour has been updated with a new fit profile for a wide range of head shapes and sizes. Other updates include all new colors and designs, a new durable and easy-to-use rotating size adjustment wheel, and larger headlamp holder clips for greater ease of use. The molded ABS shell has vents on the sides for excellent ventilation. Features: - Hybrid construction with new fit profile for a wide range of head shapes and sizes - Durable and easy-to-use rotating size adjustment wheel - Side holes for ventilation - 4 burly headlamp holder clips - Weight: 370 g, 13.1 oz - Size: 54-62 cm, 21.3-24.4 in - Construction: Injection - Shell Material: ABS - Standards: EN 12492