yokilabo NARTH Sleek & Relax Treatment (420g / Refill 350g) Formulated with penetrating fermented collagen and dense fermented repair serum, this treatment helps tame frizz and waves, leaving hair smooth and silky. It deeply hydrates the hair from the core and coats each strand, providing long-lasting moisture and protection. Enriched with hydrating keratin and moisture-retaining silk, it effectively addresses frizz and waviness, resulting in sleek, manageable hair. Scented with a refreshing sweet orange and neroli fragrance, providing a soothing, relaxing experience.