Reduces frizz: As you brush oils from your hair are spread around which lubricates each hair strand and reduces the amount of hair frizz. Stimulates scalp: Brushing your hair with the boar bristle brush massages the scalp and stimulates blood flow. Prevents oil build up: Boar bristle brushes help to distribute oil from your roots to your ends. Naturally conditions hair: The oil that is spread helps to repair dry hair and adds volume and shine.