1. Material: nylon 2. Multi-layered space design can fully accommodate computers, tablets, data cables, etc. 3. Hook and loop fastener design, easy to use 4. The back storage bag can store small accessories such as mouse and data cable 5. The inside is soft and fluffy, does not damage items, and reduces damage caused by friction 6. The suitcase strap design can be put on the suitcase 7. Waterproof, not easy to penetrate, not afraid of rain and fog 8. Effectively protect the equipment from general scratches, dirt and abrasion 9. Detachable shoulder strap design, single-shoulder/hand-held/cross-body carrying modes 10. External dimensions: 13.3 inch 36x26.5x3cm, 14.1 inch 40x28x3cm, 15.4 inch 40x28x3cm, 15.6 inch 42x31x3cm 11. Internal dimensions: 13.3 inch 34.5x25x2.5cm, 14.1 inch 38.5x26.5x2.5cm, 15.4 inch 38.5x26.5x2.5cm, 15.6 inch 40.5x29.5x2.5cm Note: The product is only a laptop bag and does not contain other items