There are generally two materials for pencil cases, namely canvas and nylon. Canvas is a relatively early material for pencil cases. It is a textile, strong and durable, and does not contain any harmful substances.
Nylon is a chemical product, commonly known as PVC, which is a kind of plastic, and its production cost is lower than that of the canvas.
Compared with canvas, nylon is more durable and waterproof, but if the production process is not in place, it will contain a lot of chemical substances, and long-term use will cause certain effects on the students’ bodies.