[Innovative Built-in USB Vacuum Compression System] This advanced technology replaces the need for a separate air pump, making your travel simpler. With just 1-Click, you can achieve airtight compression in under 3 minutes, reducing clothing storage space by up to 50% and maximizing your backpack's capacity. The built-in USB air pump is powered directly via a USB connection to a power bank or outlet, ensuring quick and effortless compression. No more extra devices, no more losing accessories[Upgraded Capacity to a 26" Suitcase] Our improved vacuum travel backpack features +75% larger main compartment, and +50% larger AIR-TIGHT compression bag, offering much more room for your belongings. Combined with an expanded design, the backpack's capacity can be from 40L to an impressive 80L, making it perfect for extended trips, whether you're packing for 2 week-long business journey, a weekend escape, or hiking/trekking adventures. You'll never run out of space again![Carry-On Size] Will the vacpack exceed the size limit at the gate? No way! Despite its generous capacity, this backpack remains a CARRY-ON size, measuring 21*14*6. This ensures hassle-free airline boarding and eliminates extra baggage fees. Additionally, a TSA-approved combination lock keeps your belongings safe and secure, providing peace of mind throughout your journey[Durable, Well-Made, and Comfortable] Our vacuum seal backpack is crafted from high-density Oxford fabric, making it water-resistant and scratch-resistant. It features high-quality SBS zippers that ensure durability and smooth operation. The backpack is designed with an ergonomic airflow system at the back, complete with thick, soft, and ventilated padding to alleviate stress on your shoulders and neck, ensuring a more comfortable and relaxing trip[Multiple Compartments and Pockets] features spacious compartments and multiple pockets, including a dry/wet separation pocket to keep wet/dry items separate, isolating damp clothes and odors. The laptop compartment holds a 17-inch laptop with a layer of thickened cushion. Additional features include a side bottle pocket, Dual Charging Ports (USB + Type-C) for on-the-go power, and an anti-theft pocket for your passport