Castile soap is traditionally made from 100% Olive Oil base which gives the soap a slippery mild feel to the bar with light lather. This is why it is good for sensitive skin. Our Castile is made from 100% Olive Oil, but we take it a step further by adding goat milk for a harder, even more luxurious bar for the most sensitive skin. Oatmeal is added for exfoliating purposes.