Question: What makes Nairobi® Sensitive Scalp Relaxer System different? Answer: Natural humectants such as Nairo-Plex-9 proteins, fatty amino acids and natural emollients oils that replenish the moisture and strength level. Relaxer PH.12.5 Created by Mixing Calcium Hydroxide (Creme Base) +Guanidine Carbonate (liquid)=Guanidine Hydroxide Non Drying Moisture Replenishing Relaxes evenly Quicker relaxer penetration Rinses quickly Increased sheen Reduced scalp irritation for extremely sensitive scalps Relaxer of choice for color treated hair Leaves hair smooth and silky.