Our replacement / spare pads are hypoallergenic and extremely high quality. Please be wary of cheaper pads on the market; most of these are single-use and often have limited conductivity. Although it depends very much on your skin type, the climatic conditions, and general use and abuse, your pads should typically last for 30+ applications. If you care for your pads well, including replacing them on the plastic film and sealing the packet after each use, they can last for a long time.