These are excellent quality masks. They wear comfortably and wash well, and the adjustable fit is enough for even my bearded partner to wear. The filter pocket is also great for loading with a surgical mask with the loops trimmed down.
Shape & smooth texture of the stone, with a concave area on one side make for a good fidget/stress relief tool. Fits well in the hand, so inconspicuous, too.
I continue to live in a "high" transmission area so masks for me ate essential. Love the different designs and the cloth is very comfortable on my skin. Great purcjase!