Feeling cold is a sensory response, which can be modified with training. You
can simply train yourself not to feel cold. Not easy as a cosseted modern,
but if you are brought up like this a child, you wouldn't know the
difference.

I agree i have been raised wearing shorts only summers and winters till my
12th birth day  , womens and girls did wear skirts ( only mens were supposed
to wear pants in the past  in France ). I don't remember suffering from cold
at all.
Also i did a 3 month ski trip in the rockies where temperature were almost
allways below zero celsius ( freezing point ) -20 wree not unusual .I made
only 2 fires during that time and regretted it ( made me cold the next
day ), i could not stand to enter a supermarket to refuel on foods so hot it
was inside ( and supermarket are generally considered cold with all their
fridges)
I just got used to low temperature .and at the times just ate  mostly dried
fruits ,nuts salt  honey and cold water
Judgements like cold or warm are relatives and always the result of
comparaisons with past experiences , in the present moment there is only
bliss of an experience.
jean-claude