Mentholatum Deep Heat Patch is an effective non-medicinal alternative to the rub and spray. Can be placed directly onto the skin at the site of pain to provide soothing controlled heat for up to 8 hours. They are odourless and air activated upon opening. Deep Heat Rub contains a special ingredient that, together with the body's natural enzymes, generates penetrating warmth that can be used to treat several types of pain. This rub contains ingredients that act as counter irritants to provide a tingling, pain relieving sensation to dilate blood vessels, re-oxygenate the tissues and relax the muscles. As it is absorbed, your body's natural enzymes turn its special blend of ingredients into a powerful painkiller.