The basics All Natural Brush Soap with Conditioner. The benefits You shouldn’t use a strong fat removing soap. Our brush soap is based on vegetable oils which clean and maintain the brush fibers. The uses 100% vegetable oil based conditioning soap for cleaning and maintaining your brushes. Also, cleans the skin of your model perfectly! The bottom line Using a gentle soap with conditioners will prolong the life as well as the suppleness of your brushes.