Keep your headset mic clean! Trim to fit almost everymicrophone out there including David Clark M7 and M4, Lightspeed, Bose, Telex, and everything else we tried.Once trimmed to length, carefully grab the headset mic muff coveron both sides and pull it down gently into place. Will stay in place on it's own. The o-ring is not necessary with our product - oursfit snugly and stay in place. The O-ring design is inferior from David Clark because if the o-ring splits, their mic cover falls off immediately.
Not ours! Headset mic covers for David Clark, Bose, Lightspeed, etc should be replaced annually for santary purposes, plus they help maintain the microphone quality - if the mic cover fails, moisture and dirt can then reach your microphone, which is an EXPENSIVE part.
Fits well over the microphone on the Bose X and does what it is supposed to do. Quite a bit larger than the original, which doesnt have any practical downside, other than with certain mic positions, you can see it out of the corner of your eye.