Schwarzkopf OSIS Flatliner Serum 200ml is an innovative treatment designed to protect and enhance hair during straightening. Thanks to its advanced formula, it creates una barrier that protects the hair fiber from high heat, effectively reducing damage and split ends. This lightweight, non-sticky serum makes straightening easier, giving softness and una shiny finish without weighing hair down. Ideal for all hair types, it helps maintain a elegante and tidy look for longer, counteracting frizz. Easy to apply, it is the perfect choice for those who want flawless and healthy hair, ensuring daily protection and care in a single professional product.