Luti Treatment Smooth (Refill), 1000g[For soft, fine, and tangle prone hair] This serum treatment addresses all the concerns caused by lack of moisture: frizz, frizz, dryness, and stiffness. Its "nurturing care" with naturally derived amino acids hydrates hair from within, leaving it lustrous and hydrated. 5 Features . Hair serum treatment: This unique formula, made with naturally derived ingredients and packed with nutrients for beautiful hair, is suitable for those with sensitive skin.