those gold/silver emergency blankets: do they really work, and how?

Question

those gold/silver emergency blankets: do they really work, and how?

In: 3859

Answer 1

I never understood how well they work until I needed one. I ran a tough mudder race in late autumn/early winter, it was VERY cold. Got given one of these blankets after I finished and whilst I wasn’t warm, I was no longer freezing