J.F. Lazartigue"s Home Spa Essential Duo with Tea Tree Oil serum is recommended to help care for long and shoulder-length hair, an intensive custom care, pre-shampoo for fine, damaged or devitalized hair. The serum is a hormonious blend of Essential Hair Cream (6.8 oz.) and Tea Oil Delicate Serum (3.4 oz.). Key ingredients restore and repair hair focusing particularly on hair fibers where it is needed.