Electrodes are used for diverse procedures and health setting check-ups. They can be used to evaluate the electrical activity of the heart, assess muscular response to electrical activity, and record eye movements. The EZ-Trode Cloth Electrodes use a hypoallergenic conductive gel that maintains smooth skin contact and even distribution of current. Simply peel away the protective backing and apply to the skin when the treatment is finished; return the electrodes to the protective backing and store in the pouch.