DailySale offers this Neoprene Winter Ski Mask 3-Pack in Black, Red, and Blue for $6 with free shipping. (PeleusTech via Amazon sells three similar masks for slightly more.) That's tied with our mention from a week ago and the lowest total price we could find for this quantity by $7. It's one size fits all.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.