With 28 liters of space, it's large enough to hold hiking clothes, a packed lunch, as well as gym change, books and binders. It offers a protected laptop section, zippered pockets, two external water bottle holders, including one with quick access to your smartphone, and a fleece pocket. The FlexVent™ suspension system With injection-molded shoulder straps, a padded breathable mesh back panel, and a lumbar panel ensure comfortable carrying.