Therasage ICMD4002 Deep Heat Medium Healing Pad with Negative Ions Therasage Instant Calmer Healing Pad features deep penetrating heat enhanced negative ions and natural jade. The format of the pad is totally flexible and made to mold to an area of discomfort for ultimate healing benefit and pain relief. Either side will give you THerasage patented deep penetrating heat therapy but the Jade Stone side also emits enhanced negative ions which are very healthy for you please refer to theNegative Ions page for more information. The Healing Pad emits special therapeutic heat that penetrates deep into your body as much as 3 inches below the skin. Deep penetrating heat has the following benefitsimproved circulation increased flexibility reduced pain relieves stress enhanced relaxation enhanced detoxification.