(see all images) Bange bag Business Smart 15.6 Inch Laptop Backpack Convertible Expandable Anti-Theft USB Charging Multi-Functional Travel Professional

Features

• INTELLIGENT INCREASE DESIGN - This backpack has smooth zippers on the back side. Once pull on the intelligent zipper, the invisible compartment will show up and equipped with extra 50% of space. Best choice for short journey and easy your daily life.
• INVINIBLE WATER BOTTLE POCKET - Made of newest high-tech waterproof material which flexibly fixed bottle or umbrella to prevent wetting out. Backpack's external USB charging port and built-in cable connected with your power bank inside which will charge your phone more easily. (Power bank does not included)
• CONVENIENT STRUCTURE - An invisible card pocket on the shoulder strap, easily taking out the transportation card to pass underground subway gate or pay on bus. The back has a strap which can hold the backpack upright on the luggage's pull rod for easy traveling.An invisible zip pocket on the back to place your iPhone, keys and wallet conveniently. Anti-explosion double zipper of main compartment is anti-slashing and water resistant, this would increase the security of your stuff inside
• MULTIPURPOSE - Roomy backpack (12.5’’L*6.2’’W*17.6’’H) with laptop compartment (lined with soft flannel) protects 15.6’’ Laptop and iPad. This backpack is made of water-resistant microfiber leather and durable ballistic nylon materials. The massage and breathable design for back side prevents you from hot and sweating, so comfortable for your daily life. ( Best choice for you in travel,business,office or commuter ). As father's day gifts
• MAIN MATERAL - Waterproof synthetic leather + microfiber. Handle: synthetic leather. Linnig material: polyester.
• USB & Type-C Charging Port Design - with 2 output port outside and the corresponding cable is also provided, which can be connected to a power bank inside the bag. (Power bank not included).