Using this Giro Tremor MIPS helmet is easy. First, put it on your head. Then, use the Roc Loc® Sport system to adjust the fit until it feels snug but not too tight. Make sure it sits level on your head. When riding, always keep the helmet on to protect your head. As for maintenance, use a mild soap and water to clean the helmet's exterior and padding. Let it air - dry completely. Don't expose it to extreme heat or direct sunlight for long periods, as this can damage the materials. Also, check the helmet regularly for any signs of cracks or damage. If you notice any issues, it's time to get a new one.