Backpacks Multi-Function Business Backpack With USB Charge For Man Multi-layer backpack, convenient to store and take things. Oxford cloth and dacron material, waterproof and wear-resisting. Three-dimensional shape, anti-theft and anti-cutting. External USB charge free your hands and enjoy the travel. Features: Multi-layer storage space backpack, convenient to store and take things. Oxford cloth and dacron material, waterproof and wear-resisting. Three-dimensional shape, anti-theft and anti-cutting. Hidden zipper on back improve the safety of travel. External USB charge free your hands and enjoy the travel. Pearl breathable pressure-reducing pad and s-shaped shoulder strap could reduce shoulder pressure. SBS zipper, stable and durable and non-skid. Multi-function such as bus pass package and shrinkable side package help you live better. Specifications: Brand: MARK RYDEN Model: 1 : MR5815ZS_SJ17 2 : MR5815ZS_SJ00 3 : MR5815ZS_SJ11 (optional) Color: 1 : Gray 2 : Black 3 : Black + Gray (optional) Material: Oxford Cloth + Dacron Style: Business Strap Quantity: 2 Capacity: No More Than 20L Backpack Size: Middle-Sized Opening Way: Zipper Lock: No Popular Element: Sewing Thread Package Weight: 1000g / 35.27ounces Item Size: 420 * 320 * 100mm / 16.54 * 12.60 * 3.94in Package Size: 420 * 320 * 50mm / 16.54 * 12.60 * 1.97in Function: Waterproof, Breathable, Wear-Resistant, Anti-Theft, Load Reduction, Anti-Knock Package List: 1 * Backpack