Purify Shampoo is designed to cleanse your hair and protect againt colour fade. The key ingredient, ZeroSulfate is an essential part of a shampoo's cleansing system, but many common surfactants, known as sulfates, can fade colour vibrancy. Designed to gently cleanse without stripping colour, our ZeroSulfate shampoos include a mild cleansing system, with no added salt, derived from coconut, corn, and sugar it delivers a rich lather and helps optimize colour retention. How to use: Apply shampoo onto damp hair. Gently massage into hair. Leave on for 1–2 minutes. Rinse thoroughly. Repeat. Leave on hair under dryer for up to 20 minutes to remove extreme buildup or “swimmers’ green. Brand: Pureology. Range: Purify. Bottle Size: 300ml.