In the heart of the Puy-de-Dôme, where the Allier River draws a curve in the center of the Limagne, the waters of the Sainte Marguerite Park come out.

In this volcanic ecosystem grows a halophile flora identical to those in salty coastal areas such as the Mont Saint Michel. Those alkaline soils nourish the springs that go through them, thus passing on to them their thermal properties.

The Cosmauvergne spring comes out of the ground sterile and gaseous. With six grams of dry matter per litter, it has a high mineral content, and is richer in calcium and magnesium than most thermal waters.

This unique sodium, bicarbonate, natural and mineral make-up gives it all its cosmetic properties.