600D polyester durable material withstands wear and tear. 1680D ballistic polyester base reinforces the bottom for ultimate durability. Heavy-duty webbing straps on top to carry by hand. Padded shoulder straps for increased comfort under heavy loads. Rucksack design for maximum storage and easy accessibility. Heavy-duty #8 zippers to secure gear inside the backpack. Top cover flap for protection from the elements. Internal padded computer sleeve in main pouch protects your devices. Small essential exterior pocket stores pens, pencils, cell phone, etc.