Ronts Large Mens Waterproof Nylon Convertible Multifunctional Laptop Backpack 1-2days Portable 17.3 Inch Travel Business Briefcase Messenger Bag BM001 Multi-Purpose: The bag is convertible for use as briefcase, messenger bag or backpack. Also the straps can be hidden when you use it a messenger bag or shoulder bag. Three carrying styles perfect for any situation, this sleek design keeps you moving in style during your commute, work, school, college, travel, etc Large Capacity: Huge roomy and two main compartments fit up to 17.3 inch laptop. Roomy, padded interior laptop sleeve ideal for most popular 13.3 - 15.6 MacBooks, laptops etc. The expansion zipper makes it more flexible, and the bag offer independent spaces for your iPhone, iPad, passport, pens, keys, wallet, watch, charger, MP3, A4 file, books, clothes, umbrella and more. Useful Design: Made with water resistant nylon with heavy duty and hardware and zippers for maximum durability and protection.The feet pads on the bottom protect bag from scratching, and double zipper design allows for easy access to stored items. Front pockets are convenient for you to get your pens, power bank, keys, tickets, etc. Portability: Providing both comfort and travel convenience, this briefcase backpack features a luggage strap for easy attachment to rolling luggage, dual carry handles with a pad, and an adjustable/detachable shoulder strap with breathable honeycomb pad to relieve pressure. Dimensions: : 18.11 x 9.06 x 13.78 inch (46 x 23 x 35 cm); Net Weight: 1.55 kg. Material: High quality waterproof nylon, durable polyester twill lining.