Remove foot warmers from the outer packaging and place in shoe like a normal insole. The complete foot will be comfortably heated for many hours. It only takes a few minutes for the warmers to reach their maximum temperature. After that, allow to stand at ambient temperature for a few minutes before use.

• Air activated.
• Can be used immediately.
• Natural heat.
• Max. temp.: 45 °C (113 °F).
• Average temp.: 37 °C (98.6 °F).
• Heat duration: Up to 8 hours.