Stops the Itch! Marie s Original Poison Ivy/Oak Soap helps remove the oils of the poison ivy, oak and sumac plants from the skin and speeds the healing process of these and other minor skin rashes. It works and it s 100% natural. After suffering from poison oak and being unable to find a cure that really worked, Marie, a medicinal herbalist for 35 years, settled down to formulate her own solution. Her 100% natural soap formula, handmade on her 40 acre organic farm in Oregon, proved to be so successful that she soon began selling it to her local hardware and landscape supply stores. It wasn t long before the word was out. Unique Triple Acting Formula.