UKEIN Travel Backpack with USB Charging Port 40L Expandable 17 Inch Carry On Backpack Water-resistant Work Business Laptop Backpack for Men

【Expandable Design】Transform this travel backpack from a personal item size to a carry-on with ease, increasing capacity from 22L to 40L. Perfect for flights, fits under the seat for hassle-free travel. 【Spacious and Organized】Within this men travel backpack, discover an ample main compartment for storage, a front pocket for small items, a dedicated 17-inch laptop compartment, and a specialized side pocket for a 1000ml water bottle. 【Waterproof and Anti-theft】Crafted from high-density waterproof material, this travel backpack ensures your belongings remain dry. Features dry/wet separation bags, an anti-theft pocket, built-in USB port, and charging cable. 【Practical and Comfortable Design】Equipped with heavy-duty zippers and reinforced stitches, this carry on backpack for men guarantees durability. Cushioned back and shoulder straps with breathable mesh, adjustable chest straps, and luggage strap for trolley attachment. 【Versatile and Reliable】This carry on backpack for airplanes seamlessly transitions between backpack and suitcase,, suitable for travel, casual use, weekender trips, or hiking adventures. Multipurpose design for various needs.