Hair oils are an essential part of any curly-haired routine. While it may seem counterintuitive to apply oil to your hair, curly hair actually needs as much moisture as it can get, and oil is the best way to do this. Because of the shape of a curled piece of hair, it is extremely difficult for the natural oils that the scalp produces to make their way down the shaft of the hair and into the ends. This can result in the ends of the hair becoming extremely dry, which in turn disrupts the curl pattern and can lead to frizzy and undefined curls. Using hair oil is a great way to combat this, as manually adding in the oils that the ends of the hair are missing will prevent dehydration and seal in the moisture gained from conditioners.