Using this helmet is easy. First, choose the right size for you, either S/M (54 - 58cm) or L/XL (58 - 62cm). Put it on your head and use the dial retention system to adjust it until it fits snugly. The short visor can be adjusted to shade your eyes from the sun. When riding, the 23 ventilation ports will keep you cool. As for maintenance, clean it regularly with a mild soap and water. Avoid using harsh chemicals as they may damage the helmet. Always check the helmet for any signs of damage before each ride. If you notice any cracks or other issues, stop using it immediately and replace it to ensure your safety.