Feature： 1.A well-knitted luggage belt is quite convenient for you to fix the laptop bag on the trolley of your luggage, making your journey and travelling more convenient wherever you go. Front reflective stripes ensure your safety in evening biking, running or walking. 2. This backpack is large and durable, which is perfect for College, travel, business, everyday use and outdoor activities. Made of Water Resistant and Durable Polyester Fabric with metal zippers. Ensure a secure & long-lasting usage everyday & weekend.Serve you well as professional office work bag,college high school big student backpack for boys,girls,teens. 3. The bag has exquisite workmanship, and every detail has undergone and several levels of quality inspection, and the details determine the quality. Please Notes: 1-2cm error of measuring is a reasonable range due to different measurement methods. Please allow little color difference due to different camera or screen show. A little smell is normal for a new bag, please put up it outside for few days. Occasion: Large size meet your daily use,shopping,work,baby care,travel ect. What's more, it's really lightweight and it's for all ages.It's a practical bag for a person who they have a lot stuff that needs carrying.