You can buy one at hot topic
you can get a Finn hat or a Jake hat at Hot topic
Finn's hat is sort of a bear skin, I read in the adventure time wiki and set on the character and clicked Finn it said it is a bear
Finn takes his hat off in "To Cut A Woman's Hair" (season 2, episode 10)
I added some links to sites that sell them.
He always wears his hat because it's awesome, but took it off a few times. :)
Go to YouTube and search Finn Hat DIY. He explained it really well. Or you can buy one from Frederator Blog. :)
Finn is not married.
Pen is one of the main characters of the show, he's the boy with the hat and backpack. He was later renamed as Finn.
i believe nothing is wrong with his hat, he simply just wears it, and hides his golden LONG hair. as shown in the episode, how to cut a womans hair
No
Finn Mertens.
well he is real in adventure time but he is not real in life!