The BANGE 1908D Expandable Laptop Backpack is a versatile and durable laptop bag designed for modern travelers. The versatile 3-in-1 design transitions seamlessly between an office bag, travel companion, and hiking backpack, offering flexibility for every occasion. With a large 45L-55L capacity, this backpack for men fits a 15.6" laptop and up to a 17.3" laptop, making it perfect for office use or outdoor adventures. Its waterproof Oxford fabric protects your gear, while the anti-theft pocket ensures safety. The bag offers a 3-in-1 convertible design—use it as a laptop backpack for men, luggage, or a shoulder bag. Ideal for both men's bags and women's bags, this laptop bag is waterproof and includes an external USB charging port for on-the-go convenience.