This backpack was fantastic for our trip. I was able to pack lunch for our flight and keep it cool in the insulated bottom area of the bag by placing a bottle of frozen water inside. Inside there is enough space for headphones and books, as well as a special compartment for storing a laptop. There is a USB port which I plugged my power bank into to charge my phone while hiking. I really like this backpack and look forward to many years of adventures with it.