Classic business backpack.Simple and casual. Two types can choose:2.0 Version backpack: Regular style, width expandable 6cm. Suitable for daily office. 3.0 Version backpack: Upgraded style, add computer compartment behind the backpack, larger capacity. Suitable for travel. Please choose according to your needs. Multi-layer large capacity2.0 Version backpack can fit 15.6 inch laptop, can accommodate 2-3 days clothing. 3.0 Version backpack can fit 15.6 inch laptop, can accommodate 5-7 days clothing, make you worry-free travel. Backpack internal structure displayFront pocket｜Middle bag｜Rear zip compartment Warm tips:2.0 Version backpack don't have rear zip compartment, don't have waterproof bag. Backpack capacity:Backpack capacity is equivalent to 20 inch trolley case.Travel use a backpack, easier and more convenient.