Walmart offers the Etcbuys Unisex Active Wear Multi-Purpose Winter Mask in four colors (Blue pictured) for $7.25. Opt for in-store pickup to dodge the $5.97 shipping charge. That's tied with our mention from a week ago, the best deal for such a mask now by $3, and the lowest price we've seen. It's available in one-size-fits-most.
Buying more than one? Note that Etcbuys via Amazon offers 2-Packs for $13.99 with free shipping. That's $6.50 per mask.