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About product and suppliers:
        Alibaba.com offers 348,683 back pack products. About 40% of these are backpacks, 1% are school bags, and 1% are laptop bags. 

A wide variety of back pack options are available to you, such as softback, external frame, and internal frame. You can also choose from nylon, polyester, and pvc. As well as from 30 - 40l, 50 - 70l. And whether back pack is free samples, or paid samples. 

There are 348,035 back pack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Pakistan, and Hong Kong, which supply 98%, 1%, and 1% of back pack respectively. 

Back pack products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 58,548 with ISO9001, 39,830 with Other, and 17,175 with BSCI certification.