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About product and suppliers:
        Alibaba.com offers 15,936 supply backpack products. About 16% of these are backpacks, 3% are school bags, and 1% are shopping bags. 

A wide variety of supply backpack options are available to you, such as softback, backpack, and laptop backpack. You can also choose from polyester, genuine leather, and 600d. As well as from 30 - 40l, 50 - 70l. And whether supply backpack is free samples, or paid samples. 

There are 15,936 supply backpack suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of supply backpack respectively. 

Supply backpack products are most popular in North America, South America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 3,158 with Other, 1,896 with ISO9001, and 1,726 with ISO13485 certification.