【Travel Backpack】 Durable and sturdy, Made of Water Resistant and Durable Polyester Fabric with high quality zippers. Ensure a secure & long-lasting usage everyday & weekend.Serve you well as professional office work bag,slim USB charging backpack,college high school big student backpack for boys,girls,teens,adults.2 side bag with not all mesh material. bottom of th bag is made of main material, very study. 【Large capacity laptop backpack】Suit to 14-17.5 inch Laptop. There are 5 storage spaces: Laptop Bag, with dedicated laptop compartment to protect your computer; The front bag for packing living things such as clothes, and File storage area (includes pencil case, keychain and several small storage pockets); small storage bag on the front, 2 side bag for water bottle and umbrella, and a anti-theft bag on the back. 【Functional and safe book bag】 Hidden Anti-Theft bag on the back to keep your laptop and valuables safe; LUGGAGE STRAP designed for traveler to fasten the backpack to luggage handle and release shoulders from burden; STERNUM STRAP help the commuter to solve the annoying problem that the shoulder straps offer slide to the edge of shoulders or slip off while you are running hastily.