Fangrui Product Details 1. Oumantu 8190 Large-capacity Expandable Waterproof Business Travel Backpack With Usb Port 2. Features: 3. Made Of High-density Fabric, Waterproof And Wear-resistant 4. Usb Charging Port Design, Charging Is More Convenient 5. Large Capacity Design To Meet Daily Outing Needs 6. 180-degree Opening Design, Convenient To Take Items 7. Two-way Zipper, Smooth Opening And Closing 8. Trolley Case Fixed Belt Design, More Convenient For Business Trips 9. Thickened Mesh Shoulder Straps, Breathable And Comfortable 10. High-quality Buckles, Easy To Open And Close 11. Thickened Soft Handles, Comfortable And Not Tight 12. Expandable Design, 24l-30l Two Capacity Modes Can Be Switched Freely 13. Product Parameters: 14. Material: Nylon 15. Function: Breathable, Waterproof, Wear-resistant, Load-reducing 16. Product Size: About 45 X 31 X 24cm 17. Weight: About 940g 18. This Product Is Measured Manually, And There May Be Errors Of 0.1-0.2 Mm And 0.1-0.2 Grams In Length And Weight; There May Be A Slight Color Difference Due To Display And Light Problems. Please Refer To The Actual Product! 19. Note: The Delivery Only Includes The Backpack, Not Other Items In The Picture!