system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: After wearing a hat all day, why does it "feel" like I'm wearing a hat even when it has been off of my head?
gpt
Much of the feeling of wearing a hat doesn't come from the contact of the hat with your skin, but from the weight of the hat pushing down or sideways on your hair.

That hair is connected to your scalp and rooted in a follicle. There are sensory receptors on your skin all the way down to where your hair actually connects.

When a hat is on your head, the weight pushes the top part of the hair or bends it, and that weight is felt by the sensory receptors in your skin.

When you remove your hat, assuming your hair has some body, is "bent" temporarily into a specific position due to the pressure/weight of the hat. Hair folds/bends in interesting ways, like paper.

That "bend/shape" of your hair as it is after having a hat on for so long, causes the same kind of sensory response as if the bend/shape was being caused by the weight of your hat. So - you feel like you are wearing your hat - because according to the sensory receptors on your skin, your hair is being pushed in a direction that mimics the weight of that hat - they can't really tell the difference.

If you were to go into the shower after taking it off, and wash your hair with shampoo to wash away the oils in your hair and thereby getting rid any such bends, you'd see the feeling going away.