Clear BackpackPerfect for school kids or sporting events. In an attempt to make our world a little safer many venues are requiring attendees to carry these bags when attending public events. Security conscious employers are having all employees use a clear backpack when transporting materials at work. These heavy duty backpacks are made of highly durable ultra clear PVC plastic with rugged polyester seams and sturdy zippers for years of service. Adjustable straps accommodate the load.