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a&q 1. what' s the feature of this backpack? canvas backpack large capacity bookbag korean style colors avialable 3 1 front zipper bag,2 water side pocket,1 mainly bag,1 inner wet bag 2. how many colors of this backpack? three colors.gray,red,black 3. who suit this kind of backpack? teenager,school backpack (high school ,colleage school....) 4. what's the weight of this backpack? with packaged it's 0.42kg. 5.what's size of this bag? 45x30x13cm 17.7x11.8x5.11inch 6.how many bags