[quickthrower2]

Putting fashion aside, probably useful for both UV blocking (turn the hat into a hijab for better coverage) and also should reflect IR so reduce the chance of heatstroke when working in the sun. Disclaimer: avoid working/exercise in hot/humid conditions at all! Work at dusk/dawn or even wait for a cool day.

[mr_toad]

I wore one as fancy dress once. The foil is very good insulation and gets uncomfortably hot even when just sitting down.

[dylan604]

Isn't that essentially the point of an emergency/space blanket? It's essentially what the JWST uses for a solar shield as well. The $.99 item you buy at any camping store probably cost NASA more than that though.

[willmadden]

>avoid working/exercise in hot/humid conditions at all! Work at dusk/dawn or even wait for a cool day.

I'm going to go out on a limb and guess that you live in the Southern Hemisphere.

[dylan604]

Why? This is the same concept in any hot/humid conditions during the summer regardless of hemisphere. It's good advice even if you hear it during the winter.

[rfrey]

People have different standards. I'm whining about the heat at 26 degrees, but it's not getting me out of mowing the lawn.

And not working during a hot winter day is comedy sketch territory. That snow isn't going to shovel itself!

[whatshisface]

...it's not dangerously hot if there is snow on the ground...

[dylan604]

You've inverted the season, so now you need to invert the temp as well.

[whatshisface]

So don't... lie still and avoid generating heat in the snow?

[whatshisface]

The southern hemisphere has the same weather as the northern hemisphere, but with reversed seasonality. You might be thinking of the American subtropics.

[willmadden]

Because it's freezing in the northern hemisphere right now, that's why.