I’m looking for a good backpack that can fit as carry on for international travel. I think it has to fit these dimensions 55 cm x 23 cm x 40 cm (21.5 in. x 9 in. x 15.5 in.) to be considered a carry on and be about 30-35L or at least needs to be squishable in those overhead compartments. If anyone has any recommendations I would appreciate it. Thanks all.