Feature:1. Shoulder strap design--The honeycomb design of the shoulder strap of the bag is comfortable and breathable, and it is not stuffy after long-term use.2. Triangular reinforcement design - the bag is reinforced with triangles, which is strong and durable.3. Scientific stratification, reasonable storage, and large capacity to meet travel needs.Specification:Material: Polyester;Fabric: Nylon fabric;Structure: Main pocket, front pocket, side pocket, back pocket;Size:Backpack: Width 32cm* height 45cm* thickness 13cm;Shoulder bag: Width 21cm*height 24cm*thickness 7cm;Pen pocket: height 10cm*width 20cm.Notes:1. Due to different displays and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.2. Due to manual measurement, please allow 1-3cm error. (1 inch = 2.54 cm)Thanks for your support :)