The air-activated sole warmers (insoles) heat up automatically after the packaging is removed. They are considered a top product for skiing or in the stadium, but are also used by many in everyday life. The warming soles fit into any (ski) boot. After opening, put the warmers directly into the boots and put them on. They develop an average temperature of around 37°C for up to 8 hours.
They heat up to 45 °C (113 °F) and keep an average temperature of 37 °C (98.6 °F) for up to 8 hours.
Insert the foot warmer into the sole of your shoe/boot to keep your feet warm in cold