Although this order took nearly 2 weeks to arrive, arrive it did--and to my delight, this sturdy little bag also doubles as a waistpack.  I have always worried that someone might just reach up and unclip and steal a waistpack.  It would be very difficult to unclip this one; the join is hidden under the long loop behind (waist side) the bag, and the clips have their own protection.  (It's much easier to look at than describe, but it's quite secure).  It is small, about 6" x 9" x 2.25", but that's a plus for keeping things light and hidden under a jacket.  Now I can easily switch from a cross shoulder bag to a waistpack.  Great!

Please note that Amazon says it is 13" x 9" x 4".  Not so.  It's about 6" x 9" x 2.25".