Introducing the High-Capacity Oxford Fabric Vacuum Compression Waterproof Backpack. This innovative backpack features a built-in vacuum compression system, allowing you to quickly expel air by pressing, without the need for a pump. Equipped with a one-way valve that releases air without letting any back in, it maximizes your storage capacity. The included vacuum compression bags isolate odors, making it perfect for travel and outdoor activities. Durable and waterproof, this backpack combines convenience with advanced storage technology. Measuring 12.99*7.87*19.69 inches, this custom high-capacity oxford fabric vacuum compression waterproof backpack. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: Portable, durable, practical for daily use.