As stated above. Using any clothing item (eg. TTsKO jacket, Marine jacket, Gorka jacket...) will get your player to overheat, within minutes. It just makes it extremely tedious having to act like a swamp monster and move from pond to pond.
God forbid if you try to cook something over a fire, you might as well cook yourself.
Harsh weather should be a thing and users should be encouraged to grab the warmest jacket they can get, as soon as they can get. Also, it will give fireplaces and heatpacks a purpose they have been lacking for over a year.