Saponified tallow ( beef fat) 
The Soap is really great for stopping or drying up poison ivy or poison oak. It is also a very mild Soap so it’s great for sensitive skin.
It also doubles as a laundry bar you can use it on stains!
Tallow Soap Benefits: Why It's Superior for Skin Health ...
Tallow soap, made from rendered beef fat, provides deep, natural moisturization, making it highly effective for dry or sensitive skin. 
Rich in vitamins A, D, E, and K, it nourishes the skin, supports the skin barrier, and provides gentle cleansing without clogging pores. 
It is an eco-friendly, sustainable, and long-lasting alternative to synthetic soaps
It’s an extremely hard Soap with long life!