Rusk Sensories Purify 33.8 oz Cucurbita & Tea Tree Oil Shampoo is a natural deep cleanser that wakes the hair up. Purify adds vitality and luster, while ridding hair and particulary scalp of impurities. Specially formulated with cucurbita and tea tree oil, natural effective astringents. Ideal for problem scalps that may be oily,flaky or have dandruff. The ultimate cleansing ritual.