Product information:Bag size: mediumCapacity: 20-35LThe internal structure of the bag: zipper pocket, mobile phone bag, certificate bag, sandwich zipper bag, computer pocketOpening method: magnetic buckleApplicable gender: neutral/male and femaleMaterial: CanvasFunction: breathable, wear-resistant, lighteningModel: BackpackHardness: medium to hardStyle: European and American retroLining texture: cottonStrap root number: double rootPopular elements: color contrastCarrying parts: soft handleOuter bag type: three-dimensional bagBag shapes: square vertical sectionCarrying system: curved shoulder strapScene: OutdoorColor: black, brown, dark grey, army greenWaterproof degree: water repellentPacking list:Canvas bag x1