BOPai Expandable Travel Professional Men Business Laptop Backpack 15.6 inch Work Smart Rucksack Anti Theft Large Multi-Function Computer Office Black with Waterproof USB Charging Water Bottle Holder

COLOUR ZIPPER STRAPES - Include blue and orange color zipper straps you can change by yourself to tie on zippers. (Per backpack has 6 zipper straps for free)
INTELLIGENT INCREASE DESIGN - Once pull up the intelligent enlarged zipper, there will be extra 40% space for stock. Best choice for short journey and easy your daily life.
FAST USB CHARGING PORT DESIGN - With external USB port and build-in cable connected with your power bank inside which will charge your phone more easily. (Power bank not included)
INVISIBLE ANTI THEFT DESIGN - One hidden zipper pocket equips on the back to pack your wallet, money, cards. This invisible design increases the security of your stuffs of value inside.
LARGE CAPACITY - Isolated Rapid-Access laptop compartment suitable for 15.6 inch computer, 23L roomy backpack size: 17.8inch(H)*11.5inch(L)*6.3inch(W). 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. (Best choice for you in travel, business, office or school)
Thickened Shoulder Strap Design - Card Slot Pocket and storage ring. Best choice for you in business, office, commuter, travel.