Expandable Capacity up to 60L: This backpack expands to a spacious 55 liters, equivalent to a 24-inch rolling suitcase, while keeping a compact, carry-on-friendly size of 12 x 7.8 x 20 inches. Travel conveniently without the need for extra baggage fees. Efficient Storage Solutions: Fitting 5x more items than a regular backpack. Organize your belongings with three main compartments and multiple hidden pockets. A dedicated wet/dry separation pocket keeps damp clothes isolated, while a secure laptop compartment accommodates up to a 17-inch device. Enhanced Anti-Theft Security: Travel with peace of mind. The main compartment features a TSA-approved combination lock, and a hidden back pocket provides secure storage for valuables like your passport and wallet. Comfort-Oriented & Aesthetic Design: Experience ultimate comfort with an ergonomic design featuring thick, soft, ventilated padding. The backpack’s airflow structure alleviates pressure on your shoulders and neck, making it ideal for long journeys and daily commutes. Made with a sleek and modern design to complement any adventure. INTEGRATED USB CHARGING PORT – Stay powered on the go with the built-in USB charging port. Easily charge your phone, tablet, Kindle, or other USB devices while using them. Power bank not included. Compatible with any standard power bank. 12333