Pureology Pure Volume Shampoo reveals natural fullness while infusing the hair with moisture & protecting colour from fading. Surfactants are an essential part of a shampoos cleansing system but many common surfactants known as sulfates can fade colour vibrancy. Designed to gently cleanse without stripping colour Pureologys Zero Sulfate shampoos include a mild cleansing system with no added salt to deliver a rich lather & help optimize colour retention. Pureologys exclusive Anti Fade Complex® is designed to protect your colour from UVA/UVB & thermal damage.