4F backpack Properties: Durable rip-stop material tear-resistant, ready for everyday challenges AFS ventilation system special mesh cushions improve circulation and stiffness of the backpack Hydrophobic impregnation slows down the absorption of moisture, protecting the contents Adjustable, breathable shoulder straps mesh lined for greater comfort Main compartment with 2 zippers two-way zipper allows quick access to the contents Pockets on the front and sides two fastened at the front and two open on the sides Laptop or tablet compartment safely stores your equipment while traveling and on a daily basis Inner pocket for small items fastened with a zipper, perfect for keys or documents Comfortable back with cushions thermoregulatory mesh supports ventilation and cooling Laminated bottom increases resistance to dirt and moisture from the substrate Reflective elements improve visibility after dark and in poor conditions