At the butcher’s shop watertight, for the electrician antistatic and for the firefighter flame resistant – safety shoes need to meet a wide range of different requirements. They are also equipped with a toecap made from steel or aluminum and provide special cushioning in the heel area. However, this degree of protection comes at a price. Especially in waterproof versions, feet quickly start to sweat unpleasantly due to the commonly used impermeable water barrier. This can lead to skin irritation.
To increase breathability and thus create a significantly improved foot climate, the Swedish-Finnish manufacturer Ejendals developed a safety shoe with holes in the sole. It even meets the safety requirements of the European standard DIN EN ISO 20345, Class S2. S2 stands for waterproof safety shoes. But how can you have holes in a shoe while still retaining its waterproofing characteristics?