Carrying bag for gas mask and additional equipment. Model introduced in WWII and produced until the end of the USSR. Used also as a satchel-bag. Simplified version - without the outside small pocket and done up to the button.
Basic equipment for each Soviet soldier - the bag-backpack to carry equipment and "trophy items". Made in the 70-80-s. With pocket and "window" for soldier's name. Version in colour sandy - dedicated for forces being stationed in Afghanistan.