For the busy student with a full course load and a host of extra-curricular activities, the Educated Backpack 30L will keep you going from first period all the way through late-night cram sessions.30L volume18.11 X 12.99 X 7.08 inchesBody Materials: 90% Poleyster, 7% Nylon, 3% SpandexLining Materials: 100% PoleysterPadded laptop sleeveFits most 16″ laptopsExterior zippered pocket with organizersStretch mesh water bottle pocketExternal bungee storage