Vacuum Compression Border Backpack High-end Business Backpack Expandable Large-capacity Business Travel Bag Computer Bag Features: Excellent waterproof performance: waterproof fabrics, such as high-strength waterproof nylon or polyester fiber coated with waterproof coating, seamless welding technology and waterproof zippers an excellent waterproof barrier. Whether it is a sudden downpour or wading across a river, it can ensure that the items in the bag are dry and safe, providing protection for outdoor equipment, clothing, etc. Vacuum compression function: Built-in vacuum compression system, through the specially designed and compression bag, easily exhaust , effectively reduce the volume of soft items such as clothing. This not saves backpack space, allowing more supplies to be carried when traveling, but also makes the storage of items more regular, easy to find and use quickly, and improves travel convenience. Ergonomic design: The shoulder straps are carefully designed according to the back of the human body, and are filled with wide, soft and breathable materials to reduce the pressure of carrying and avoid shoulder and back pain. The chest strap and waist belt can be flexibly adjusted to evenly distribute the weight to the whole body, ensuring and stability during long-term walking and mountaineering, making the journey easy and pleasant. Multifunctional storage partition: It has multiple storage partitions with reasonable layout. The main bag has a large capacity for placing large items such as clothes and sleeping bags. The front pocket is convenient for out commonly used small items, such as , mobile phones, and wallets. The side net pocket can hold water bottles and umbrellas. There is also a special waterproof layer or partition inside to separate dry and wet items to meet the storage needs of outdoor storage. material structure: Made of , wear- and tear- materials, the fabric has been specially treated to have excellent wear resistance and can resist scratches from outdoor thorns and rocks. Hardware accessories such as zippers and buckles are also sturdy and , and are not easily damaged after repeated use. They can withstand the test of travel and frequent use, and are a solid partner for outdoor travel. Product Description: size：30*46*17CM