Travelling light is having less then 10kg's on your back.. Now try walking 2km's... It's still tough... You won't possibly have the back support either.. My bet is you cant adjust your pack depending on what your hieght is.. Is your 3yr guarantee worldwide?? Cause a fucked up back pack in the first week of your trip isn't going to help you at the end of your trip, unless you can trade it in, in whatever country your in... Oh, should I say, mine is life time guarantee