This award-winning serum will change your skin care game. Clarins Double Serum ($85) works effectively to improve skin of all types, all ages and all ethnicities. Its dual-pump system (hydric and lipidic) separates water and oil ingredients until application, while delivering just the amount of product that you need. This serum works to reactivate five functions that are vital to improving your skin: hydration, nutrition, oxygenation, protection and regeneration.