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This backpack is designed to solve the three problems. The first one is that ordinary backpack is easy to be stolen by opening the zipper secretly. The second one is unnecessary embarrassment caused by forget to pull zipper. The third one is that ordinary backpack is hard for some special crowd, such as rheumatism, to zip out. Besides, it improves the convenience of the backpack.
By a small clip and a large clip along with magnet, the backpack can close automatically when we are back it and open easily when we put it down.