Using the MET Rivale MIPS helmet is easy. First, adjust the straps so that the helmet fits snugly on your head but isn't too tight. You should be able to move your head freely without the helmet shifting. When riding, always make sure the helmet is centered on your forehead. As for maintenance, clean it regularly with a mild soap and water. Avoid using harsh chemicals as they may damage the helmet's material. After cleaning, let it air - dry in a cool, shaded place. Check the helmet periodically for any signs of damage like cracks or loose parts. If you notice any issues, it's time to replace the helmet. Also, don't expose the helmet to extreme temperatures for long periods as this can affect its performance.