Our Men's Hair foam contains water, biotin and castor oil. It helps the serum penetrate to wake up the sleeping hair follicles and encourage new hair follicles to grow longer and thicker. Its use is simple: 1. Clean and dry your hair and scalp. 2. Apply 1-2 pump foam directly and evenly, gently massage the scalp with a brush for 1-2 minutes until it dries naturally. After use, the hair skin is awakened and gradually grows more and more black hair, and it is very healthy.