If you can put your hands on aftermarket cans and keep them on, then there should not be a problem.
Some makes of cans run hotter than others, and as the packing degrades, they all get hotter.
My SS Yosh TRSs run cool, safe enough for my wife never to have to worry about getting burned.
Can material has an effect as well.
SS is the hottest.
Titanium is not as hot.
Carbon Fibre is the coolest.
If one is worried, as simple wrap of heat blanket material around the cans where the soft luggage touches, should be more than adequate.