For those of us who are active and don't carry purses or wear sport / suit jackets, this is an excellent way to keep from loosing the bluetooth.  This is the only one that I know of on the market.  I must lean over a lot or be very active because I was loosing them.  Put it in here, with the ear piece on the top and fasten the Velcro strap over the ear piece and it is securely stored.  Much cheaper that replacing bluetooth units!