tinyat men's 15 inch lapbackpacks computer male school backpacks rucksacks leisure for teenage travel shoulder mochila grey sh190725

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 of this bag have