Pillows from rushes (mats) are used for winter and spring warming of the bee club. Sizes: length 450-470mm, width 300-390 mm, thickness 40 mm.
When used to fence a bee nest (as a safety board), it absorbs moisture, and at the first inspection in the spring, it quickly dries out in the sun.
A pillow made of rushes is not harmful to bees and beekeepers. In the summer, it is used on top of the nest, which limits overheating of the bees' nest.