Sebamed Baby Detangling Shampoo 250 MlHealthy skin has a biological, slightly acidic surface called the acid mantle. The delicate skin of a newborn lacks this protective acid mantle, which is established during the first few months of life. Only if the skin has a pH value of 5. 5 is it able to safeguard against the penetration of pathogenic micro organisms and harmful environmental influences. This natural protective function helps to prevent dehydration, irritation, and allergies. Baby