If there's one time of the year you can indulge your nerdy fantasies, Halloween is it. Why don a chainsaw and hockey mask when you can literally eat rainbows? Our women's black unicorn costume is everything you could want from a Halloween outfit. Dark and mysterious? Check. Colorful and fantastical? Check. Warm and comfortable? Bonus! There's no awkward sweating or bathroom break nightmare with this unicorn costume. Just breezy living and epic dance moves. Much like being a unicorn, we'd guess. The rainbow-colored horn and tail are the cherry on top of this super cute costume. Once Halloween is over, hang with your gal pals at a pajama party or snuggle into it when you've got a case of the Mondays. There's even a convenient zip to shut yourself away from the world and dive into Unicorn Land. All the horseplay with none of the hay - sign us up!