Used a few times after purchase. Weight: 250g (size M) This ultra-lightweight helmet features an integrated lightweight carbon wing, enhancing aerodynamic performance and impact force distribution. Increased open-air intake ports at the front of the helmet efficiently improve ventilation and airflow around the head. The size adjustment system extends from temple to temple at the back of the head, keeping the front more open, improving ventilation while ensuring a secure and firm fit. The outer lightweight PC shell is molded to the helmet liner, improving structural stability, and the optimized EPS liner maximizes performance, enhancing protection in the most critical zones. Size Chart: S 50-56cm / M 54-59cm / L 56-61cm Retail Price: ¥66,000 Price negotiable. Please inquire.