With the new Jawbone 2 Bluetooth Headset comes fitting problems for many.The Jawbone 2 has a 'Voice Activity Sensor' that rests on your cheek and detects if you are talking so it can filter out background noise accordingly.

Included in the box are a few earbuds and loops to accommodate different users. This is the source of the Jawbone 2 fitting problem. Getting the Jawbone 2 to fit properly on my ear was a bit challenging. I tried various earbuds and flexed the earhook several times to get it to stay put but it never felt comfortable and often come loose. It would be better if the earhooks provided were more flexible. They are the type that require a lot of force and even still tend to go back to their original shape.

Plantronics Discovery 925 soft ear gel is one of the most comfortable ear gel on the market today and it is a direct replacement for the rubber earbud on the Jawbone 2 bluetooth headset.They fit very nicely on the Jawbone 2 Bluetooth Headset, are extremely comfortable, and hold the jawbone 2 in perfect position on the face for the noise cancellation to work.The Jawbone 2 was worthless with the included earhook and rubber earbud fittings. I could not make them fit, and without good face contact, the Jawbone 2 noise cancellation does not work. Plantronics Discovery 925 Soft ear gel allows me to  comfortably wear and use the Jawbone 2 without an earhook while doing a lot of moving around. In fact, I don't think I could shake the headset off my head if I was doing the 'DUTTY WINE'
  
The Plantronics Discovery 925 soft ear gels are the ultimate solution for the Jawbone 2 Bluetooth Headset fitting problem, and they are going to make a lot of potentially disappointed Jawbone 2 customers happy.They come in three sizes, large, medium and small. I recommend buying all three sizes to determine your best fit.