> Those emergency blankets don’t work like normal blankets - by trapping air and preventing it from moving - but by reflecting heat and keeping it in.
This reads as if to imply emergency blankets vent air freely, that's obviously not true.
This reads as if to imply emergency blankets vent air freely, that's obviously not true.
I'm not sure exactly how effective the mylar blankets are and under what circumstances, but this is what "trapped air" refers to.
The main problem with these solutions AIUI is the trapped humidity.