Epsom salt, fine Epsom salt, also known as magnesium sulfate is a chemical compound made up of magnesium, sulfur, and oxygen as is easily absorbed through the skin. Epsom salt is great for exfoliation, aches, relaxation, and detoxification. 8oz package comes in a resealable plastic bag sealed to help keep moisture out. White label products available (white label means no label on products, you add your own brand label)