* Wear a belt or elastic band under your clothes, and clip the beltpack to that belt in the small of your back. The elastic band could be an athletic support bandage held together with Velcro.
* Sew a pocket inside your clothing and put the beltpack in the pocket. You might want to cover the beltpack in a Ziplock Baggie to keep out sweat.. Cut a hole in the bottom of the pocket for the mic cable.
* Clip the beltpack to your neckline in the back.
* Put the beltpack in a fanny pack worn under clothing.
* Get a wireless mic transmitter pouchbelt for aerobics instructors. You could wear it under clothing if necessary. One source is:
* Clip the beltpack to a garter belt (Emily's idea!)