Update: The original deal is sold out, but we found a 50-pack of face masks for $18.99.

As more states mandate the use of face masks, there may be a shortage. Amazon is running a special on face masks.

Amazon is currently selling SupplyAID disposable face masks for $18.99. This is one of the cheapest face masks we have seen. (Prefer a more stylish mask? Check out our guide to where to buy face masks for Ben Sherman, Gap, and other masks.)

Face masks feature three layers of protection. It features ear loops and a bendable nose clip, which provides a better seal than face masks without a nose clip. There is also an intermediate layer with a pathogen filter. [This 50-pack of disposable face masks typically costs around $30 to $40.

Throughout the week, Tom's Guide will feature the best sales in July as part of its Summer Savings event. Be sure to check back often for the best opportunities to save.