This professional ski helmet is specifically designed for outdoor sports enthusiasts, combining safety protection with comfortable experience Utilizing advanced safety technology, the high-strength ABS shell can withstand strong impacts, combined with premium EPS cushioning liner that effectively disperses impact force during accidents, providing reliable protection for your head Built-in removable thermal lining made of high-quality insulating materials effectively locks in body heat, suitable for sub-zero environments, while being easy to clean and maintain for hygiene Carefully designed ventilation system includes multiple air vents and adjustable ventilation switches, allowing you to regulate airflow according to exercise intensity and personal needs, ensuring dry and comfortable head without fogging issues Size L specification is ergonomically designed to fit most adult head circumferences, paired with precise adjustable strap system that achieves perfect fit without discomfort during extended wear Available in five fashionable colors - yellow, green, black, rose red, and gray to meet different users' personalized preferences. For custom color options, please contact customer service for details Suitable for various outdoor sports scenarios including skiing, cycling, skateboarding, making it your ideal protective gear for winter sports and outdoor adventures