A set of high-quality safety helmets, ideal for training centers, climbing groups, or group outdoor activities. The helmets are from the well-known brand Xinda, featuring a durable design and light weight. Features and Technical Specifications: Protection: The outer shell is made of impact-resistant ABS material, with an inner EPS lining for effective shock absorption. Size: Easily adjustable to fit head circumference from 52 to 62 cm, making it suitable for both genders (men and women) and even youth. Ventilation: Comfortable design with ventilation holes to ensure airflow and keep the head cool during intense activities. Uses: Ideal for rock climbing, caving (Speleology), rappelling, and working at heights. Weight: Lightweight (approximately 305 - 390 grams depending on the model) to reduce strain during long wear. Condition: Used and in excellent condition. Colors: Available in two colors: Light Green/Turquoise and Yellow [as shown in the picture]. Includes adjustable chin straps for complete stability.