Using your Zamp FS - 9 helmet is easy. First, select the right color and size for you. Put on the helmet and adjust the chin and scalp vents according to your comfort and the airflow you need. The helmet's interior is plush and removable, so you can take it out and wash it when it gets dirty. Make sure to replace the cheek pads and crown liners to get a perfect fit. When closing the Z - 19 shield, use the lock button to keep it secure. As for maintenance, clean the exterior of the helmet with a mild soap and water solution. Avoid using harsh chemicals as they may damage the fiberglass shell. Check the helmet regularly for any signs of wear and tear, and if you're in an accident, replace the helmet immediately as its safety features may be compromised. Remember, this helmet is Snell M2020D and DOT rated, so always use it in accordance with safety standards.