To use this helmet, first adjust the straps so that it fits snugly on your head. The straps should be positioned under your ears and tightened just enough so that the helmet doesn't move around. When riding, always make sure the helmet is securely on your head. As for maintenance, use a mild soap and water to clean the helmet. Don't use harsh chemicals as they can damage the helmet's materials. After cleaning, let it air dry completely. Check the helmet regularly for any signs of damage like cracks or dents. If you notice any, replace the helmet immediately for your safety.