Have used Mach 1 for a few months now, with the standard ear plugs the mic was always moving even with the over ear clip, with custom moldsI still have to use the clip (strange ears perhaps) but what a difference in noise suppression they were about £60 and worth every penny, still hear the helio but at a level that is real quiet, Rx audio clear, Told Tx audio is real crisp, & no batteries
