The shirt could have a standing collar about 2.5-3 cm high [2], fastened with one button, and later - with a row of several. Kosovorotkas that did not have a standing collar were called golosheikas and were always fastened with one button. Linen kosovorotki were traditionally widely used in Russia in civilian use, being synonymous with the Russian men's shirt, and also as a soldier's underwear. According to the descriptions of foreigners (for example, Giles Fletcher), there was a custom of wearing two shirts - the bottom (shirts), not decorated and made of light fabric; and the top (top), decorated with embroidery [1].
