I don't know how well they work. I have a sibling with one that they use frequently, but that sibling is a bit odd. (I think the blanket circulates water throug

I don't know how well they work. I have a sibling with one that they use frequently, but that sibling is a bit odd. (I think the blanket circulates water through it, but I've never really asked.) Their use may just be due to a placebo-esque effect.