Starting from an observation that temperature sensors may provide indications of pain, we focused on arms. In fact, mostly forearms. There has been quite a lively international discussion – hampered, as usual, by time-zones and languages – about where to locate the temperature sensors. Then there are the logistics of which sensors, inside or outside of the material (shown here a sports armsleeve from Suddora) and how the clothing holding the sensors can be laundered. Given the history of hardware, it is imprudent not to expect the sensors will need to be replaced.