Can i change my head rest on my car? If not what’s the best kind of pillow to buy for the head rest?
Strictly speaking it’s a head restraint, designed for safety rather than comfort. I don’t use one but try here: https://autoquarterly.com/best-car-headrest-pillows/
No, you can’t. And as @davepsinbox_157004 posted, it is not a rest.