Olaplex Eyelash Bond Building Serum strengthens and nourishes lashes from root to tip with advanced bond-building technology. This lightweight 4.5ml serum works to repair and fortify lash structure, promoting resilience and natural growth. Infused with conditioning agents, it helps prevent breakage while enhancing lash density and flexibility. Ideal for those seeking to restore lash vitality and maintain healthy, voluminous lashes. Apply daily for optimal results and visibly stronger, more resilient lashes.