Science enthusiasts would swear by the brain hat that sits cozily on your head replicating the looks of the most important organ of your body. It is a winner for its unconventional looks that consist of coiled pipe-like structures (I-cords) sewn all over a plain knitted skull hat. The go-to color is pink, but you can play around with other yarn colors as well. It showcases a fun pattern without compromising on the warmness quotient of the headgear.