Turkey Red Oil is also known as Sulfated Castor Oil. It is the only oil that will completely disperse in water. It is a surfactant and therefore mixes well with water. It is beneficial to the skin because of its moisturizing abilities. Sea Salt and Sodium Bicarbonate soften the water. Honey is also good for your skin. It has the ability to attract water. Oat Flour helps to counteract dryness. Sodium Lauryl Sulfoacetate makes the foam. Just drop in your tub under running water. $3.29 each