Overpriced but the best I could find
The price is ridiculous, but they are the best straps I have been able to find.  If you, like me, have invested in an expensive, high-quality mask, you might as well have a good strap to hold it.  All the other ones are designed so that the mask falls off if you pull the mask down around your neck.  This one stays put and is secure.  I bought a bunch for my family and don't regret spending the money since no one else has a comparable design as far as I can tell (at least on Amazon).  So just go for it.  This pandemic won't be over any time soon.
Rating: 5 stars