Old Navy Oversized Plaid Flannel Boyfriend Tunic Shirt Instead of a full-on costume, get in the Halloween spirit with an orange-and-black Old Navy Oversized Plaid Flannel Boyfriend Tunic Shirt ($37) this October. Image Source: oldnavy.gap.com Old Navy Oversized Plaid Flannel Boyfriend Tunic Shirt $37 from oldnavy.gap.com Buy Now