Using your Core Action Sports Helmet is easy. First, adjust the chin straps to fit your head size using the size - adjustable feature and fasten the red safety buckle. Make sure the helmet sits comfortably on your head. When you're done using it, remove the 3 - piece inner padding and wash it regularly to keep the helmet fresh and clean. Store the helmet in a cool, dry place away from direct sunlight to maintain the quality of the EPS foam lining and ABS outer shell. Always check the safety certificate and the overall condition of the helmet before each use. If you notice any damage, stop using the helmet and replace it for your safety.