During the 80’s the Austrian army had a load carrying system that consisted of a large backpack that looked like a US army Alice Pack and a smaller bag that could be carried as a front pack or as a butt pack. Alternately the small bag could also be worn as a shoulder bag or a small backpack on it’s own. The bags are made from Nylon (Polyamide) and usually carried in combination with a pistol belt.
The idea from a front pack was copied in later years by the Dutch army. They had a small duffel generally known as the Rotota bag or soldiers handbag. This was also attached to the shoulder straps of a backpack. However the Dutch used plastic fast release buckles while the Austrian pack system uses metal hooks. Another difference is that the Dutch front-pack is carried on the chest while the Austrian front-pack is carried a little lower, on your belly. Perhaps this was done so the soldier has more space to handle a rifle.