It is very important to use Sunsilk Ethnique Neutralising Shampoo when relaxing your hair. Sunsilk Ethnique Neutralising Shampoo is formulated to complete the relaxing process and will indicate if all the relaxer has been properly washed out. If there is still relaxer in the hair, the shampoo with foam blue. It is important to keep washing hair until the shampoo foams white, otherwise the relaxer will continue processing your hair, which could lead to hair and scalp damage.