This is the Haskell Keratreat Anti-Residue Pre-Straightening Shampoo, formulated to deeply cleanse the hair and remove buildup before a professional straightening treatment. Its advanced formula ensures that the hair structure is optimally prepared, allowing subsequent straightening products to work more effectively and provide longer-lasting results. It offers intensive purification without compromising the integrity of the hair. Ideal for use as the first step in a keratin treatment or deep cleansing routine needing residue removal.