Castile Soap: Your Solution for Irritated Skin Organic Castile soap is good for sensitive skin because it is made with natural ingredients that are gentle on the skin. The soap is also free of harsh chemicals, sulfates, and artificial fragrances, which can irritate sensitive skin. Additionally, Castile soap is hydrating and can help to soothe and protect the skin. You can get your castile soap, goat's milk soap, and other healthy organic soap in Singapore here.