Bentonite clay is a type of clay that is known for its absorbent properties. It is often used in industrial applications as a binding agent or as a sealant. Bentonite clay can also be used for personal care purposes, such as in a facial mask or in a bath bomb. When used in a facial mask, bentonite clay can help to draw out impurities from the skin and can also help to exfoliate the skin. When used in a bath bomb, bentonite clay can help to provide a soothing and detoxifying effect.