Thermopad heat pads are activated by air.
They bring a natural warmth thanks to the unique composition of the contents.
They heat up to 45 °C (113 °F) and maintain an average temperature of 37 °C (98.6 °F) for 6 to 8 hours.

S - Shoe size 36 - 39 (Length: 23 cm)
L - Shoe size 40 - 42 (Length: 25 cm)
XL - Shoe size 43 - 46