Specification: Offers ample storage with a spacious main pocket for A4 magazines, daily clothing, and other essentials. Features a breathable back for comfort, made with breathable sponge for softness. Material: Polyester/canvas. Closure: Zipper. Gender: Unisex. Functions: Breathable, waterproof, and wear-resistant. Weight and Dimensions: Three-piece set: 0.55kg; 17-inch backpack: 0.30kg; 44*28*13cm. Meal pack: 0.18kg; 25*19*8cm. Pen case: 0.07kg; 22*11*5cm. Package options: 1 pen case, 1 meal pack, 1 backpack, or 3 items (pen case + meal pack + backpack). Note: 1. Manual measurement may result in a slight size variance of 1-3cm. 2. Actual item color may differ due to monitor settings. 3. To purchase the three-piece set, select the 3Pcs SKU; otherwise, only the selected item will be included.