https://austintechsupply.com/blogs/news/benefits-to-wearing-...
You will note that, unlike the masks most people wear, it goes around the head, not over the ears, and employs not one but two flat rubber head straps.
IMHO ear-mounted masks cannot possible be as closely fitting over the face and effective as those that go over the head.
I first saw this mask in a photo of President Biden, who was wearing one.
I figured if it was good enough for him and his advisers it was plenty good enough for me.
Available (Amazon U.S.) here for about 60 cents apiece for a pack of 20: https://www.amazon.com/dp/B09FM2P1KF?ref=nb_sb_ss_w_as-reord...