【Waterproof Fabric】The school bag is made of unique 300d oxford fabric with metal zippers,water-resistant and durable.It can protect your items from rain. 【Ergonomic & Lightweight】Two "S" Curve Padded Shoulder Straps with extra thick and ultra-breathable design, provides easy carrying and strength enhancement. Ideal gift for child,friends,family. 【USB Charging Port】With the integrated USB port, you can connect your power bank inside and easily charge your smartphone while you're on the go.(Power Bank is not included in the package.) 【Airflow Back & Luggage Strap】Comfortable airflow back design with soft, ventilated multi-panel padding provides you with maximum back support. Reinforced bottom allows the school backpack to stand on its own. A luggage strap allows you to attach a backpack to the suitcase. Very good for city trip.(Age：over 3 years old) 【Size & Capacity】17.7 x 12.2 x 7.1 inch,25L.Laptop compartment for 12",13",14",15",15.6" laptop/Macbook/Notebook.Tablet compartment for 7",8",9",9.7" tablet.There are many pockets inside, which can accommodate 3-4 A4 folders, power bank, books, keys.Side pockets for water bottles and umbrella.Ideal for school and work.