Padded and breathable mesh back panel of this computer rucksack design help with air convection, ventilation, and heat elimination. Comfortable wide breathable mesh shoulder straps with plentiful sponge pad help relieve the stress from your shoulder1.The backpack is made of durable waterproof fabric.2.Laptop compartment holds 15.6 inch laptop.3.One anti-theft zipper pocket for your valuable things.4.Lots of storage pockets are placed in innovative ways.5.Adjustable shoulder straps relieve the stress of your shoulders. Internal structure of the bag: zipper pocket,mobile phone bag,ID bag,interlayer zipper bag,computer pocket.Opening method: zipperFunction: breathable/waterproof/wear-resistant/anti-theft/shock-resistant/burden-reducingSize: 47X31X18CMPackage included1 *backpack