Features 1、With strength and toughness at the same time, combined with EPS cushioning foam, which is light and high‑quality, it provides all‑round protection for yourself, which can safely and effectively reduce the impact of collisions and protect your head. 2、The helmet is ventilated to provide cooling airflow, suitable for riders of all ages. The special aerodynamic design allows air to circulate and keeps cool while riding a bicycle. 3、The double buckle provides good support, and the high‑density nylon braid has a strong pulling force. It adopts gear‑type adjustment, and adjusts the size by rotating left and right, which is simple and fast. 4、The reference head circumference is between 58cm-63cm, and the head width is about 17.5cm. There is an adjuster knob to adjust the size of the head circumference. 5、The adjuster clip and buckle are positioned away from the rider's face to provide comfort and satisfy most cyclists' satisfaction. Specification Item Type: Bicycle Helmet Material: PC helmet + EPS foam + Nylon webbing + PP adjuster Reference Head Circumference: Approx. 58-63cm/22.8-24.8in Head Width: Approx. 17.5cm/6.9in There is an adjuster knob to adjust the size of the head circumference. Applicable People: Both men and women are suitable Features: Comfortable and breathable, multi-layer protection, convenient installation, light weight and high quality, air circulation, firm base. Package List 1 x Helmet