Making a workout video? Get the Tune Belt Vertical Microphone Transmitter Carrier Belt and don’t worrk about losing your microphone while your doing jumping jacks! 
Here’s Amazon’s take:
Tune Belt Vertical Microphone Transmitter Carrier Belt
This neoprene carrier belt holds microphone transmitters vertically. The design was finalized after being tested by experts in the fitness sound industry. It features bound (reinforced) edges for increased durability and a longer life. The sung-fitting neoprene belt is lightweight, comfortable and fits most of today’s latest and most popular microphone transmitters.
