Feature:1. Large capacity, easy to store laptop, tablet, mobile phone, headset, glasses, wallet, kettle, umbrella, pen, book, etc.2. Small bag, middle size bag and backpack three-piece design, you can use according to your needs.3. Nylon fabric, wear-resistant, scratch-resistant and splash-proof, providing all-round conservation for your device.Specification:Features:Large capacity, easy to store laptop, tablet, mobile phone, headset, glasses, wallet, kettle, umbrella, pen, book, etc.Small bag, middle size bag and backpack three-piece design, you can use according to your needs.Nylon fabric, wear-resistant, scratch-resistant and splash-proof, providing all-round conservation for your device.Equipped with telescopic buckle, easy to adjust the length of the shoulder strap.External USB port design, you can charge your phone easily.Smooth zipper design, items are not easy to lose.Specification:Type: Laptop backpackColor: Wine Red/Black/Dark Blue/Grey(optional)Fabric: NylonInner material: PolyesterApplicable item: Laptop, tablet, mobile phone, headset, glasses, wallet, kettle, umbrella, pen, clothes, book, etc.Small bag size: 17 * 10 * 1cm /6.69 * 3.94 * 0.39inMiddle bag size: 23 * 20 * 5cm /9.06 * 7.87 * 1.96inBackpack size: 40 * 30 * 12cm /15.75 * 11.81 * 4.72inPacking list:1 * Small bag1 * Middle bag1 * BackpackPackage List:1 * Small bag1 * Middle bag1 * Backpack