BUTTON Russian patent published in 2018 - IPC A44B1/00 

FIELD: satisfaction of human vital requirements.

SUBSTANCE: invention relates to the production of fittings. In a button containing a fastening element and a hollow body with holes in its wall, the body has transverse folds with the possibility of changing its volume by compressing and stretching the folds. Invention extends the range of buttons.

EFFECT: proposed button is not difficult to manufacture and convenient to use, because it is well held in the hand and does not slip out of the slit.

1 cl, 3 dwg