... 2.waterproof,shockproof 3.light weight 3.ISO9001:2008 black Oxford computer backpack 1. OXford ,high strength ,and high abrasion resistance materials2 ... . Can be used as backpack, or used as handbag3. zipper,reliable quality,running smoothly.4 ... bartack in stress parts,sturdy and durable8. Packing: PP bag black Oxford computer backpack