Lontreau's Core 4 Kit is specifically formulated for people on the move and designed to simplify your skincare routine. The Core 4 Kit includes four products that hydrate, energize and protect the everyday mover's skin from environmental stressors. Includes: Endurance Hydration, an energizing protective hydrator. Game Changer, a global antioxidant serum. MVP, a 30% Vitamin C Oil in Squalane. Recovery Hero, an overnight restorative treatment.