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
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
He always wears his hat because it's awesome, but took it off a few times. :)
You can buy one at hot topic
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.
In "Adventure Time," Finn takes off his hat in several episodes, most notably in "I Remember You," "The Lich," and "The Time Adventure." In "I Remember You," he removes his hat during an emotional moment with Marceline, symbolizing vulnerability. In "The Lich," he takes off his hat as a gesture of seriousness when facing danger. Each instance highlights significant character development and emotional depth.
Go to YouTube and search Finn Hat DIY. He explained it really well. Or you can buy one from Frederator Blog. :)
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.
Because Pendleton Ward wanted it that way, what does it matter.. ? It's like asking why Finn's hat is white... it just is...
He has blonde hair.
to keep his hair under control while fighting