Double Serum The therapist plays a double game: it brings together a care agent "oil-based", whose characteristic is to moisten the fiber with a result finesse, creamy texture and a "top coat", denser, to seal and process ends. It offers a unique outcome through a subtle combination of ultra-sophisticated formulas, but contradictory in terms of formulation. For who ? Damaged hair and over-solicited (erosion levels 3-4), specific for thick hair. What effects? Protect from heat up to 230 ° C. Fiber is instantly repaired and strengthened. The hair is protected from heat and makes the 2x faster drying. The spikes are smoothed.