Specification: Large storage space, large capacity main pocket for A4 magazines, everyday clothes and other items.Breathable back, comfortable to carry, back made of breathable sponge, soft, comfortable and breathable. Material: Polyester/canvas Opening method: zipper Applicable gender: neutral Function: breathable, waterproof and wear-resistant Weight Dimensions: Three-piece set: 0.55kg; 17 inch backpack: 0.30kg; 44 x 28 x 13cm Meal pack: 0.18kg; 25 x 19 x 8cm Pen case: 0.07kg; 22 x 11 x 5cm The package contains: 1 x pen bag or 1 x Meal pack or 1 x Backpack or 3pcs (pen bagandmeal bagandbackpack) Note:1. Due to manual measurement, there may be a slight tolerance of 1-3cm. 2. Due to differences between different monitors, the picture may not reflect the actual color of the item. 3. If you need to buy a three-piece set (pen bag and meal bag and backpack), you must choose the SKU of 3Pcs. If you buy a pencil case, the package you receive will only be a pencil case, not a three-piece set. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.