The popular butterfly electrode now with our exclusive Gelflex-ProE Technology. These electrodes provide the perfect coverage for larger areas such as the lower back and are flexible enough to keep up with your active lifestyle. The soft cloth covering also moves freely under clothing to provide discreet TENS pain relief. The adhesive stays stuck through multiple uses and the poly bag provides convenient and sanitary storage when not in use. These will be the only electrodes you will ever want to use.