If you plan on spending your winter months battling Decepticons, take a gander at this crocheted Optimus Prime beanie. It won't let you transform into a truck, but it will keep your face warm.
Etsy seller BeeBeeKins makes these and other quirky winter wear. Want a Thundercats hat that screams Panthro or a handsome Tusken Raider hood? You've come to the right crafter.