My wife has one from Campmor. She calls it her Buggoule as
it is good for refuge from mosquitoes too.

Don't know how hell e berg can patent something so old as a cagoule.

Homeless folk around here will sit under some plastic with a
candle to survive the night.

Cavers keep a garbage bag tucked in their helmet suspension.
When deployed they use their carbide lamps to heat the air
in the shelter if they become injured and have to wait for
help.

With a larger tarp, several can sit our of the storm with
the edges tucked under them.