They seem to work very well.
Summit KN95 Face Mask - Individually Packed Masks
Really like the fit! Does not cut into my skin below eyes and it covers my jaw. The ties around ear fit my husband perfectly and for me, it just need a small knot on one side for a perfect fit. Usually, masks' ties around the ears are too tight for me. Love the different colors, but usually wear the black. Easy to breath with and makes me feel confidently safe. Will only purchase Brookwood from now on.
arrived quickly, good product