Walmart offers this Unisex Adult Werewolf Halloween Costume Mask for $4.91. Choose in-store pickup to avoid the $5.99 shipping fee. That's tied with last week's mention, $5 off, and the lowest price we could find. (Similar masks start at around $10 on Amazon.) It's made of 50% latex and 50% polyester.

Note: This deal is for the mask only; the bodysuit that appears in the image is not included.