The hygroscopic desiccant on the basis of silica gel absorbs moisture. These bags are used inter alia in sending electronics, components and goods and to protect components from excessive humidity. The recording capacity is ± 40% of the weight of a bag. The bags may, depending on the intensity of use up to 10 times to be regenerated by the action of heat (± 10 min at 100-120 ° C for example in a hot-air oven).