Since AA ktatkn rules carry in dia. So apa solution nk backpacker ? Meh sis gtau pasal beg ni. Vs deuter for sis tis much better. Deuter yg lonjong tu sng sgt nk kena timbang klu nmpak tggi. But tis beg i recommend. Banyak poket , waterproof and the best part design dia mcm luggage tarik cabin tu plus boleh expand lagi. Dia ada provide expand zip. And sis dah try totally worth it. Tali dia lebar & ada cushion and i can fit around 10kg+ tp still nmpak kecil tau. https://s.shopee.com.my/5pop5tGGJP