helps to get yer mitochondria goin if you take a shower and dry off outside and get dressed in the freezin arse cold, if you go bak in the warm area, it wont work. then layers and electric socks will help. just putting on the freezin arse clothes gives a sensation of warmth.

side note, i have been usin my therma cell to keep warm, works under the jacket, or in my hands to keep blood runnin through that release finger.