I have a bandana type, for running in and out of a store, but thought I should get a mask, if I'm going to be in a place for awhile. $5.27 delivered 4 days, off eBay. Face Mask Reusable Washable Covering Masks Fashion Clothing Men Women, or just search "face mask".
Material may seem thin, but very comfortable, and should be adequate. Rated Safety Level Class B, China standards. They have several at good prices, delivered USPS from US dealers on eBay.https://abcnews.go.com/GMA/Wellness/video/face-masks-provide-best-protection-71550321
