Features: This vacuum backpack features a large capacity for long trip and outdoor bag, allowing you to carry clothing, gear and other essential with ease. The waterproof material ensures that your belongings protections from damage in rainy or wet conditions, so you can enjoy outdoor activity. Equipped with innovative vacuum compression technology, which can effectively reduce the loading space, making the backpack lighter, easy to store and carry, and space-saving. With inflatable suction pump, easy to operate, quickly achieve the vacuum state, no need for additional tools, optimized the use experience, enhancing portability and practicality. Expandable design allows the backpack to adapt to the needs of different occasions, and flexibly adjust the capacity according to the needs, convenient to deal with changing travel plan. Specifications: Product name: Extended vacuum backpack Material: Oxford cloth Size: about 32x20x49cm/12.6x7.87x19.29in Color:Black /gray/ green/ blue Package Includes: 1pcs Backpack note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.