Note: due to different personal measurement methods, there will be some errors in the size, which belongs to the normal situation, and the actual object shall prevail1 weight: 500G2 backpack type: soft back3 transport system: air cushion belt4 closure type: zipper5 main material: Polyester6 Lining material: polyester7 main materials: Oxford8 capacity: 20-35 litersThe package includes:3x BackpackIf you have any problem, you can send an email to let us know. We will solve your problem within 24 hours