Skin in need of softening and hydration.100% Pure Magnesium Chloride Flakes are an ideal natural bath additive for softening skin. Derived from the ancient Zechstein seabed in the Netherlands, one of the world's purest remaining subterranean mineral sources, our pure magnesium flakes have traditionally been used to improve skin hydration, and make a soothing addition to bath water and foot baths.