Mad Hatter

I took a pic of myself in my 'specially designed' head covering, so you could take a stab at guessing what it's for. I know it also showcases what a goofball I am (this is something we all know), but besides that, what do you think it's purpose is?  A Mad Hatter's Tea Party, perhaps? 

This is what the inside of my winter fleece hat looks like:

Why on earth would I need a carboard insert? Well, I don't have a hardhat or bicycle helmet so I improvised, to protect myself whilst re-organizing our attic space (I'm the only one in the family who can fit through the entranceway and stand up in the space). This is what I had to protect myself from: