• These teardrop-shaped MedGel™ electrodes directs sweat around the electrode and stays securely attached during stress tests • Comfortable, thin, fluid-impervious, medical-grade foam • Flexible lead wire attachment with our perforated strip backing • Prolonged electrode freshness and life with our resealable bag (50 pack only) • Easy removal with full-edge lift tab • Clear tracings every time with our high performance, specially formulated gel and extended surface area • Can be used during X-Rays and MRIs in areas where metal is prohibited - Radiology, Cath Lab, Surgery, etc. - with our radiotranslucent snap