The ESD sock WORK ESD with long heel for the cushion at the behind rim of the shoe is indispensable, as it prevents an electrostatic charge. It provides protection from electro static charge which can, among other things, damage or distroy electronic components. The bandage of the mid foot provides a perfect position at the foot. The high proportion Thermolite® works temperature-regulating and enables a very comfortable wearing comfort.permanent electro static discharge (ESD - electro static discharge) through metal fibrestested according to DIN EN 61340-4-3, certified as appropriateto be worn in ESD shoestemperature-regulating due to 70% Thermolite® polyester fibresdurable terry solemid foot bandage for a perfect positionlong heel for cushion at the behind rim of the shoeplush under the toes protects from blisters and pressure marks.