We drew on centuries-old wisdom to create our Castile Soap, which takes its name from the Olive Oil-based soaps originating in Castile, Spain. We start with premium-quality Olive Oil—the star hydrating ingredient of the original Castile Soap recipe—for a nutrient-rich boost of moisture. We add light, moisturizing Coconut Oil and pure, potent Eco-Harvest® Tea Tree Oil to create a soap that's as luxurious as it is versatile, equally useful for the hands, face and body.