Vacpack Backpack, Vacuum Backpack Travel, 2024 New Backpack with Vacuum Compression, Vacuum Bags for Travel, Compression Bags for Travel！！ Product Specifications： Inches: 19" × 13" × 6-8" (After expansion) Centimeters: 49cm × 32cm × 15-20cm (After expansion) Materials: Main Material: Waterproof Oxford cloth (Waterproof/Wear-Resistant/Moistureproof). Other Materials: Nylon herringbone, Polyester, Neoprene Foams, Polvethylene Foams. Package Contents: 1 × Vacuum Backpack 1 × Electric Vacuum Instructions For Use 1. Place the items to be loaded into the various compartments in the backpack. 2. Open the cover of the vacuum pump interface on the backpack. 3. Use our vacuum pump or a vacuum cleaner with corresponding interface to suck the air out of the backpack and activate the vacuum compression system to compress the items to the desired size. 4. Close the cover of the vacuum pump interface on the backpack. Warm Tips: 1.When using a vacuum compression system, make sure there are no sharp objects inside the backpack that could damage the backpack or the compression system. 2. Due to the light difference, the color may be slightly different. 3. Please allow slight differences due to manual measurement. 4.We provide quality customer service. If you have any quality problems, please contact our customer service immediately, we will spare no effort to help you solve the problem.