Using a lens longer than 6”? Like to do long distance cycling, horseback riding or ATVing? You may wish to add a chest clip. It allows your to flip your lens up and secure it close to your body. It prevents the end of your lens from getting knocked and it keeps all the weight central to your core. Depending on the length of your lens you may need to have your camera in the camera harness extenders to prevent getting knocked in the chin.