Being a professional backpack  brand , all Mountain Wolf  backpacks are entitled a free 12 months warranty from the date of purchase . Damages caused by unqualified materials and workmanship are entitled for free maintenance , excluding from natural depreciation and carefulness / improper used , provided by our company . All backpacks return for maintenance are required to present warranty card or invoice in a clean appearance . All Mountain Wolf backpacks cannot wash by machine. It will lose the warranty when it wash by machine.

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