Using your Lazer Cityzen KC KinetiCore Helmet is easy. First, adjust the TurnSys system to fit your head comfortably. Make sure it sits evenly on your head and is not too tight or loose. You can attach the Universal LED for better visibility when commuting at night. To secure your helmet to your bike, use the lock hole. When it comes to maintenance, clean the outer ABS shell with a mild soap and water solution. Avoid using harsh chemicals as they may damage the helmet. After cleaning, let it dry naturally. Always check your helmet regularly for any signs of damage. If it has been in a significant impact, replace it immediately for your safety.