cool iron

so last night i was doing laundry
and i pulled a shirt out of the dryer
that needed to be ironed, still.
i read the tag
and it says "cool iron if necessary"

what is up with that?
i absolutely hate it when tags say that.
it's necessary that i iron this shirt,
but what the heck is a "cool iron" going to do?
if i want to press something,
it's kind of important that the iron is hot.
who decided that a non-hot iron would work?

i just imagine some scenario
where i don't even plug the iron in
and press it on the shirt.
nothing happens
and i say "done and done!"
and my shirt is still wrinkled.