Ted, I buy the heat pouches that Lidl sell during ski week, last for an hour and reactivated by simmering in boiling water. They are brilliant to resolve cramps and non working digits. I keep them in my jacket pocket, car etc. I have my grandfathers hand warmer which he had during the wars (pilot in first, soldier in second) and then used when he went racing. I’m not brave enough to carry around such a fire hazard!
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