A few years ago, these were hard to find.  A merger or buyout or somesuch had somehow messed up distribution.  So, when I found some at a local store, I bought several pairs.

What I received were not manufactured the same.  What had been an elastic band around the opening, which made taking them off and putting them off easy, is now some kind of cord with little or no stretch to it.  In general, they are more cheaply made.  If you are looking for the originals, these aren't them; if you want cheap, that's these.