WHAT IT IS Experience the tingling cleansing and refreshing sensations of CHI Tea Tree Oil Shampoo. WHAT IT DOES CHI Tea Tree Oil Shampoo gently cleanses and rids hair and scalp of impurities while balancing oils and strengthening the hair. Tea Tree Oil is a natural antioxidant that unclogs pores and removes build up while replenishing moisture to soothe and condition the scalp.