Biolage Protein Shampoo + ConditionerThis Biolage duo is great for all natural and curly hair that is struggling with a rough or dry feel. If you apply heat to your hair, have color, get braids or you know your hair could use a gentle dose of protein, this duo is for you. You can also mix and match this duo with any of your moisturizing shampoos and conditioners. Discontinue use if irritation occurs.