Soviet military boots (Kirza)

Kirza (Russian: кирза) is a type of artificial leather based on the multi-layer textile fabric, modified by membrane-like substances, produced mainly in the Soviet Union and Russia. The surface of kirza imitates pig leather. The material is mainly used in production of military boots, where it is a cheap and effective replacement for natural leather. It is also used in production of the belts for machinery and automobiles.