A deep conditioning mask is a hair treatment designed to nourish and hydrate the hair more intensively than regular conditioners. These masks typically contain rich ingredients like oils, proteins, and vitamins that penetrate the hair shaft, helping to repair damage, reduce frizz, and improve overall texture. They are often used once a week or as needed, depending on hair type and condition. To use a deep conditioning mask, apply it to clean, damp hair, focusing on the ends where damage is most common. After leaving it on for the recommended time, usually 10 to 30 minutes, rinse thoroughly. Regular use can lead to healthier, shinier hair, making it a popular choice among those seeking to maintain their hair health.