Kosovorotka

It was worn by all peasants in Russia — men, women, and babies — in different styles for every-day and festive occasions.

[1] Easy to make from one sheet of fabric,[2] this garment is traditional for Russians, Mordovins, Setos, Komi-Permyaks and other ethnic groups in Russia, as well as in some regions of Moldova.

The shirt is not buttoned all the way down to the hem, but has several buttons at the collar (unfastened when the garment is pulled over the wearer's head), though these are positioned off to one side (regional styles vary between left and right), instead of centrally, as is customary with a typical Western 20th and 21st century man's shirt.

The side slit was to prevent cross pendants that peasants wore under their shirts from falling out when they bent down during active physical labor.

Since the late 20th century kosovorotkas appear mostly as souvenirs and as scenic garments of Russian folk music, song and dance ensembles.