Temperature resistance is linked to size and bodily composition. An easy example is the small obesity rate in cities like Singapore, regardless of the modernized diet fat people don't hang around in a country which has 4 seasons of tropical hyper-humid summer, it is already too hot there for tinny people.
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A cyborg is now roughly 30% of what it used to be, they are about only 16 kilograms of bio-matter.
What is the lowest temperature they could withstand for a lengthy time?
I came to understand that human flesh survives better in situations where the temperature is either too hot or too cold, weak cells die leaving only the sane and young ones to survive. Extreme temperatures count as a mild-chemotherapy in a sense.
The reason the character is throwing away their flesh like an used tissue, is the aspiration for longevity and escapism from the frail and weak side of life, Does this justify the question?
This is why I need to know the limit temperatures the cyborg can resist, the maximum amount of stress that can kill the weak cells but not all the cells.