Yes, it is common for people to carry backpacks in front for added security and convenience in crowded or unfamiliar environments.
People at school, for example, kick, trip and step on wheeled or rolling backpacks therefore valubles can break so carrying backpacks are better.
The North Face sells backpacks that are usually made for people who climb or sports on mountains consequently their backpacks usually are military-style.
A common reward for a folkway is social acceptance. A folkway is the normal behavior people follow because of tradition or convenience.
Brief case
The most common way people apply for a Social Security card and number is through the mail.
u go to the store and ask the people what fabric is the best
Schlage is the most common one, but Medeco is very common too for people who value their security.
So people could have something to carry school supplies around.
The convenience.
She didnt take it from anyone, the people suplied backpacks.
Ammo, canteen, maybe clothes if they were lucky, letters, food.
To be more of a convenience for people.