Using the CORE Action Sports Helmet is easy. First, choose the right size according to the size guide. Then, put the helmet on your head and adjust the chin straps so it fits snugly but not too tight. You should be able to move your head freely without the helmet shifting. When using it, make sure the helmet is always properly secured before starting your skate or bike ride. As for maintenance, the inner padding is removable and washable. Take it out regularly and wash it with mild soap and water, then let it dry completely before putting it back in. Avoid exposing the helmet to extreme heat or direct sunlight for long periods as this may damage the materials. Check the helmet for any signs of damage, like cracks or dents, before each use. If you notice any damage, it's time to replace the helmet for your safety.