User-Friendly Vacuum Compression System:The system is simple to operate: 1. Open the valve, 2. Manually compress to release air, and 3. Close the valve tightly. The Vacuum Backpack effectively compresses your belongings, freeing up significantly more storage space. For quicker compression, you can optionally use a vacuum pump or vacuum cleaner. (Note: The backpack just include a vacuum pump.) MULTIPLE POCKETS: This Vacuum travel backpack for women has multiple pockets to categorize your carry-on items well. EXCELLENT TRAVEL BACKPACK: The back of this carry on backpack is designed with a luggage fixing strap, which can fix the backpack on the luggage and make the travel more convenient; the shoulder straps of this flight approved backpack are built-in soft padding, which can relieve the fatigue caused by carrying the backpack for a long time, and the shoulder straps are designed with a removable chest buckle, which can help to fix the backpack. LUGGAGE STRUCTURE DESIGN: The main pocket of this personal item travel bag is designed with a 180-degree closure and open, and has a large capacity, so you can easily put in and take out your items.You can use this airline approved backpack as a small suitcase for your travel accessories. External dimensions: (L*W*H)11.8"*5.9"*16.9";Weight:1.22KG/2.69LB.This capacity makes it suitable for long - term trips, and the Vacuum Backpack's space - saving ability combined with its size provides a great travel solution.ColorblockPolyester