It contains 3 different sizes of Pro-Keratin Ex which binds and interlocks to the natural keratin in your hair and rapidly rejuvenates the natural keratin protein structure leaving your hair healthy and strong. It also contains Rice Amino Acid and fibers that deeply nourishes the hair and adds volume. Direction of Use: After shampooing, apply on damp hair and leave it for 3-5 minutes. Gently massage and rinse off with water. Use this product in replacement of your daily hair conditioner.