The notice at the top reads:

Items sold by Etsy sellers, such as masks, aren’t medical-grade. Etsy sellers cannot make medical or health claims. When selecting a mask, consult official guidance to make the right choice for you.

Which is very helpful of Etsy, as I was planning to walk around with it in my pocket just assuming the little guy would protect me from the coof. Instead I need one of those medical grade Venetian comedy mask key-fobs for that!