This head lice kit features tea tree oil shampoo and pure tea tree oil. Tea tree oil is a natural oil that has effective antibacterial and antifungal properties. The included shampoo contains 100% pure tea tree oil and is hypo-allergenic and fragrance-free. This safe, natural treatment is mild enough for daily use to naturally kill head lice and nits. It also helps prevent head lice re-infestation and can be used to treat scalp conditions such as dandruff and psoriasis. Your head and scalp will feel nourished and clean.