"The only salt-free and chloride-free electrically conductive gel, recommended for all electromedical procedures. Salt-free characteristics make it particularly suitable for long-term applications. Spectra 360 differs significantly from all other electrically conductive media...it works by wetting the skin, thereby reducing skin resistance. Features : - Non-gritty STAY-WET® formula allows for prolonged use without re-application - Product of choice for ECG, TENS, monitoring and pediatrics - Non-irritating, hypoallergenic, bacteriostatic - Salt-free, no sodium ion transfer - Product of choice for conductive rubber/carbon electrodes.