Fits notebooks with up to 18 screens; Resilient, high-density nylon encases the backpack, sheltering gear from harm; Back panel molded & vented to provide air circulation to keep wearer cool & comfortable; Reinforced, weather-resistant, nonslip base provides added protection against the elements while easily bearing the weight of gear; Dedicated, padded pockets protect notebook & tablet device; Large main compartments & several additional pockets ensure ample storage; Toggle strap for headphones; Includes power adapter bag; Dim: 19.25H x 15.5W x 7.5D; Lifetime warranty;