Proper fit, comfort and ease of adjustment are just as important for smaller climbers as they are for their big headed parents. The ELIOS helmet is durable and offers efficient protection against impact with its ABS shell and polystyrene foam liner. It is entirely adjustable and adapts to all head shapes. The sliding ventilation slots allow the user to open or close them depending on conditions. It is very versatile, and adapts to climbing, mountaineering, caving, via ferrata, canyoning, etc. Weight 11 oz.