A pair of pads lasts around 20 applications, or 10 to 20 hours. If you're treating most days, or more than one person is using the device, single pairs become a recurring errand.

Ten pairs of Premium Pads Medium covers that. Medium is the everyday size and suits most areas of the body, and all ten pairs carry the internal silver grid, which spreads the sensation more evenly across the gel surface than the EconoPads do.

Buying in bulk comes in for less than ten pairs bought separately.