French Grey Salt is a bath salt harvested by hand in the Guérande region of France. This all-natural sea salt is gathered using ancient methods that preserve the mineral content of the salt. This salt undergoes no treatment, washing or refining after it is harvested from the clay-lined ponds that give it the treasured grey color. Prized for its moisture and high trace mineral content of calcium, potassium, copper, zinc, iron. French Grey sea salt is world-renowned and thought to promote restful sleep and it's calming effect on the nervous system. It is also thought to help immunity to disease, infections, illness and helps get rid of existing mucus build-up. It is ideal for a luxurious bathing experience, Breton can be used for soaking in the bath or in your own bath salt creations. Fine Grain: Breton Fine grain is stone-ground to a similar consistency to table salt, making it perfect for Neti Pot solutions, homemade soaps and salt scrubs, as well as bath soaks.