Value set with best-selling trio of Shampoo, Conditioner and Serum to strengthen and protect, packaged in exclusive gift box from Louis Barthélemy, limited. DESCRIPTION For those seeking strength and length. Used in combination with the Hair Alchemy Shampoo and Conditioner, the Hair Alchemy Fortifying Treatment Serum provides nearly instant fortification: Clinically proven to make hair 2.9x more elastic and 133% stronger.* Designed for gifting (and collecting) in a limited-edition box featuring original artwork by Louis Barthélemy.