Bootleggers love these things for installing mini-microphones for bootleg recordings at live shows. Me, I just wanted a retainer that would be adjustable, comfortable, and look cool while hiking, working out and sweating :  Sure beats those old-fashioned chains my grandmaw wore :lol

Update:

Not even 2 months later, and my croakies broke! I can only figure that between the freezing weather and being abraided by the collar of my coat, the elastic couldn't take it. They snapped cleanly right at the bead.

Fortunately, Croakies has offered to replace them.