Restructuring treatment UNA Strengthens the internal struttura of the hair: the restructuring treatment UNA Drop is formulated to fortify the internal struttura of the hair, making them stronger and more resilient. This serum penetrates deeply into each strand, preventing breakage. Strengthens elasticity: improves the elasticity of the hair with the restructuring treatment UNA Drop. Enriched with silk proteins, this serum lengthens the hair without breaking it, keeping it smooth and soft.