What's the opposite of hat?

Maybe it's the doorway mat.


Why? Because a hat

Is something where


You put your hair:

With a mat, you can't do that.


You can put your head

Into the air instead,


Or even into, if you dare,

A large and scary teddy bear.


But a mat, let's admit it,

Is just too flat; it's not permitted


To put your face

Where there isn't any space,


It's something that you sha'n't do,

Even if you really want to.


And so I think I've proved

My point. I hope you're moved.