@nprofile1q... I probably used mine for around 15-20ish years as well. Had them warranty repaired several times and ended up getting I think 4 pairs total. I also have a pair of custom made Peltor hearing protectors with Porta Pro elements in them. :D
But a few years ago due to office noise I switched to over-ear Audio-Technica ATH-M50x first and then to Sennheiser Momentum 4 noise canceling. Now my Porta Pros just wait in the desk drawer.