WOW Skin Science Onion Black Seed Hair Oil with Comb Applicator is a personal care product that is designed to nourish and strengthen the hair. The hair oil is formulated with onion and black seed oil, which are known to have a range of hair benefits, including promoting hair growth, reducing hair loss, and nourishing the scalp. The hair oil also comes with a comb applicator, which makes it easy to apply the oil to your hair.