Based on sulfurous geothermal water, this shampoo has a gentle cleansing effect. Suitable for all hair types. SULFATE-FREE. PARABEN-FREE. DERMATOLOGICALLY TESTED. Usage: Thoroughly wet hair and evenly distribute the shampoo along the length of the hair, preferably diluting it with a small amount of water, massage the scalp and hair until a soft foam forms. Then rinse with warm water.