carry on osprey ariel backpack 55 Back Pack Osprey Ariel 65 Pack -

Extra grip strength is required, but theres something else, too

17" laptop backpack $64.99 64.99 USD Case Logic Laptop Backpack 17" laptop backpack Streamlined styling and smartly placed features add up to a minimalist footprint

Your water needs will depend on a wide range of factors, including your personal makeup (do you sweat a lot or a little, how much water does your body tend to need, etc.?), the conditions you encounter while hiking (hot and sunny or cold and shady?), the length of your trip, the presence of water on-route, and whether or not you're traveling with a water filter

At 55L, its pushing the limits of airline carry-on standards but should be fine to store onboard a plane if theres room