Heavy-duty, 700-denier nylon with Rain Defender durable water repellent and coated fabric in key wear zones, Glove friendly zipper pullers and side release buckles for easy access, Back panel trolley sleeve allows you to slide backpack over handle of trolley luggage, 1 side mesh bottle sleeve, 1 weather resistant zippered side pocket, Zippered base storage compartment for boots or dirty clothes, 15" padded laptop storage compartment with zipper, File folder and zippered phone sleeve on the inside of main compartment, Wide mouth main opening for full visibility of inside, Side sleeves on each side of inner main compartment for stowing larger items,