One of the must-have winter accessories when temperatures drop is the heater. Still little-known by most people, they offer incomparable practicality and the thermal comfort of a hot-water bottle. The way they work varies from one product to another: they can be activated by contact with air, an electric heater or a chemical heater with a clip-on pellet. The latter is a reusable product, as all you have to do is run your heater through boiling water before it can be used again. Heaters are appreciated in many situations: for your daily outings, as well as for use in sport. Placed in your pocket, hand warmers allow you to warm your hands quickly, whatever the outside temperature.
