The sole warmer fits in every shoe and provides comfortable warm feet even at very cold outside temperatures. Thermopad Sole warmers are manufactured to the highest quality standards and activate automatically after contact with oxygen. The warmer emits up to 8 hours of pleasant warmth The heat pads are particularly popular with emergency services, stadium visitors, winter sports, outdoor work, in the cold store, Hunt, forest, fishing, tents or in children, for whom the hand warmer facilitates the school path at freezing temperatures. The hand warmers are comfortable, discreet and odorless.Thermopad consists of a mixture of natural substances.This mixture consists of iron powder, salt, activated carbon, water and clay mineral (vermiculite).The substances are carefully and in the correct proportion, so that a granule is created which has the ability to react with oxygen.A soft fleece that enables the entry of oxygen, but not the outlet of the powder, makes the warmer the WAS he is, a sm