This Large-Capacity Autumn-Winter Vacuum Compression Backpack is designed for maximum storage with a one-way air valve, allowing you to compress contents by hand for efficient packing. Featuring multiple compartments and pockets, it includes a dedicated dry-wet separation pouch for organizing various items during travel. The exterior is made of waterproof laminated material, while the inner layer is durable Oxford fabric. A separate laptop compartment provides added protection, and the ergonomic honeycomb back padding ensures comfort and breathability. The backpack also features a hidden zippered compartment to store the shoulder straps and can be secured to a suitcase. Customize it with your logo for a personalized touch. Measuring 18.11*11.81 inches, this custom large-capacity autumn-winter vacuum compression 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.