Using this POC Axion Mountain Bike Helmet is straightforward. First, adjust the 360° adjustment system to find a comfortable and secure fit. Make sure it sits evenly on your head. Before each ride, check that the breakaway peak is properly attached. When riding, the helmet will keep you cool due to its well - designed ventilation. After your ride, use a mild soap and water to clean the helmet. Avoid using harsh chemicals as they may damage the EPS liner or the PC shell. Store the helmet in a cool, dry place, away from direct sunlight. If the helmet has been in a crash, replace it immediately, even if there are no visible signs of damage, as the internal structure may be compromised.