Shock absorbing and heavy duty: This ski helmet uses a high quality ABS outer shell with an expanded polystyrene EPS liner to provide strong impact absorption and durability in drops or collisions. Thickened earmuffs and anti collision pads: Thickened earmuffs plus internal anti collision pads keep you warm and protected in cold conditions; the removable lining is easy to clean for lasting comfort. Improved cooling system: An 8 hole ventilation design with a dynamic, streamlined construction promotes airflow and reduces resistance for a comfortable skiing experience. Enhanced fit flexibility: The adjustable design with a head circumference adjustment button allows a custom fit for different head sizes, improving safety and wearing comfort. Use scenarios: - Downhill skiing on cold, windy days where protection and warmth are essential. - Snowboarding in parks or on challenging terrain where ventilation and secure fit matter. - Day trips or backcountry ski touring requiring easy lining maintenance and reliable comfort.