Double Serum is a complete age-defying concentrate from Clarins that helps preserve your skin's youth and beauty. It ensures the optimal functioning of the skin's 5 vital functions and protects against epi-ageing. The serum targets the signs of ageing linked to natural ageing and those induced by lifestyle and the environment. Benefits include diminished signs of ageing, visibly smoother and firmer skin, and skin that feels soft, comfortable, and radiant. To use, mix and warm the serum in your hands, then apply to the face and neck using draining-pressure movements from the middle of the face to the sides. The serum comes in a 50ml size.