Masks must penetrate the hair shaft in order to repair it. Beverly Hills hairstylist Yoshi Hagiwara has an ionic water that power-boosts any conditioning treatment you apply after. "My Magic Water was developed for Harajuku girls with bleached hair that's razor-cut, permed, and very damaged," he explains. "The hair shaft is supposed to be filled with minerals, vitamins, and protein. After a chemical treatment, hair gets dry and limp. Magic Water changes hair's pH to an alkaline 12 to open the cuticle so protein and moisturizers can penetrate. When you close the cuticle with heat, hair is shinier and stronger."