What does Holdens hat mean?

Holden and his hat are never far apart. He always has it on him and it never leaves his side. In many ways i think he uses it as his security blanket. Just as a kid i had this pillow that i carried around with me everywhere, no one could use my pillow, or touch it. It was my favorite thing and it went everywhere i did. That is until i grew up and no longer needed my security blanket. Holden refuses to grow up and that is why he still holds on to this hat. He wants to be a child, he admires any child he comes up against from random ones in the park to his sister and brother. Holden needs his hat in order to feel safe and secure and safe. It is his way of still being a child and seperating himself from the adult world.