I am reading a book about the Inuit around the Arctic Circle.
There this comment from one of the native hunters : "I hope to never experience again a day as hot as that'
The temperature of that day was 50 f, (10c)
The point here is that we use gear to make up for our lack of exposure to the weather....
If you walk the streets of Melbourne at night you may come across a homeless person or two.
Never seen one with a tent/mat/sleeping bag....
Franco
BTW, this is the external frame pack used by our kitchen porters in Nepal :