The oregon areo site http://www.oregonaero.com/p76-2001.html (scroll down to HGU84P) list either the hush kit or the soft seal cups, but doesn't recommend the combo with both. I hate my plastic cups and dig in behind my ears when wearing NVD's. I'm going out of pocket on these since the squadron PR shop is broke (been waiting for some replacement CEP's for 6 months). I just want softer cups, don't really care about sound- I'm wearing ear plugs.