Bathing Salt. Epsom Salt 100%. (Magnesium Sulfate) Epsom salt is commonly used as a drawing soak or for the continued cleaning or soaking of wounds such as punctures or swelling. It's an old tyme product that has proved itself repeatedly as a wonderful soak for drawing infection from closed wounds that need to be re-opened to pull infection out. Available in two sizes. 1 lb. or 4 lb.