CoolBELL Sbases on the cutting-edge of fashion trends. Pursuing the best quality of laptop bag category and devoting to providing the best product and service to customers. We make every effort to achieve the best in every detail of design,color, material, sewing, sales and service. Suits for College students, businessmen, office staff, teens, students, outdoor gens etc. Brand: CoolBELL Description: Convertible Bag Size: 18.8 x 5.7 x 13.7 inches; Fits up to 17.3 inches laptop. Weight: 1.0 kg Color: Black Grey Blue Material: Oxford Nylon cloth; 210D waterproof polyester lining Three carrying styles: Backpack style:Comfortable back strap system, easy and convenient to load on your back. Shoulder bag style: One back pocket for hiding the back straps, A removable Shoulder strap been include, when you use it as a shoulder bag. Messenger bag style: One back pocket for hiding the back straps when you use it as a messenger bag or briefcase. Feature: This bag can convert to backpack, shoulder bag and briefcase,just you want it to be. So convenient for carrying. Construction: Roomy main compartment Designed for keeping laptop or tablet etc which up to 17.3 inches. Include a elastic belt to fix the laptop. Still more room for keep 2-day summer clothes. USB 2.0 Charging port design Built-in USB cable. Use it to connect the power bank, then connect your phone with original USB cable to the USB port, you could charge your phone conveniently. Front up pocket with flap and buckles. To improve the safe for your wallet, phone, or passport you want to take out quickly, we make this practical design. Front down accessory pocket. This big pocket designed for keeping laptop accessories, cards, pens, notebook etc.