Assertion: school backpack | /r/MadeOf | padded shoulder straps
Facets:
value: often
type: TEMPORAL
Source sentences:
text: While traditionally very simple in design, school backpacks are often made with padded shoulder straps and backs as well as additional reinforcement to hold large numbers of heavy textbooks, as well as safety features such as reflective panels to make the wearer of the pack more visible at night.