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For some time now, retailers have been offering cooling functional clothing for working in the heat. It consists of a special material that can store water and which evaporates at higher temperatures. Cooling is based on the same principle as sweating. The agricultural social insurance (SVLFG) recommends the product and subsidizes a cooling vest with up to 30 percent.
You can read a detailed product test of functional cooling clothing in agrarheute magazine 08/20.