Name: vacuum compression shoulder bag Material: Oxford cloth Size: 30*18*46cm (can hold 17 inch computer) / 11.8*17.09*18.11 inches. Expanded size: 64*30*28cm/25.20*11.81*11.02 inches Description Vacuum compression: the vacuum bag is equipped with a one-way valve. You can choose our electric vacuum pump for quick compression or manually press to release the air, which reduces wasted space between the baggage expansion vacuum bags. The main zip is designed to be tight and will require some force to pull, don't worry, the zip will not break. EXPANDABLE CAPACITY: The capacity of this vacuum bag can be up to 60 litres/16 gallons, equivalent to a 24 inch trolley case, but it is still sized as a carry-on baggage with dimensions of 11.8 * 7.1 * 18.1 inches, no extra baggage fees and hassle-free airline boarding. MULTIPLE COMPARTMENTS: the Vacpack features three spacious main compartments with multiple hidden pockets, a dedicated wet/dry separator pocket for separating wet and dry items and isolating wet clothes and odours, and a dedicated laptop compartment that can securely hold a 17-inch laptop. PRACTICAL DESIGN: The Vacpack travel backpack features a TSA customs combination lock on the main compartment and a hidden zip pocket on the back to ensure a worry-free journey. With the external USB charging port, you can put your charging device into the bag and charge your mobile phone without having to hold the heavy charging device in your hand. ULTIMATE COMFORT: Your comfort is our top priority. The back of this vacuum compression backpack is ergonomically designed for airflow and features a thick, soft, breathable padding that reduces pressure on your shoulders and neck. MULTIFUNCTIONAL APPLICATION: Made of high quality polyester fabric, it provides extra protection for your belongings during rainy days and ensures long term use for daily and weekend trips. It is perfect for college backpacks, weekend trip backpacks, aeroplane carry-on backpacks, professional business backpacks, perfect gift for tourists Product List Vacuum Compression Shoulder Bag*1