This amazing hat can do many things.
It can keep your head a little warm, mess up your hair, and even reduce the risk of sunburn when you have no hair.
It will make you way cooler than all of your friends, or at least establish that you're a bigger nerd.
It's also pretty handy to toss it in your cart and bump yourself up to free shipping ;)
One size fits most. Velcro strap on back for size adjustment.