I could attest to that. They're really effective as ear plugs, too, due to its almost custom IEM-like fit. The ZS3 makes my neighbor's dog (goodness, their dog has a loud, annoyingly startling bark) less annoying. Anyway, regarding KZ's aftermarket cables, I recently bought their latest SPC cable (the smoke-colored one; the one they call "High Purity OFC cable"). Does this new cable less prone to turning green/oxidation unlike the earlier white v1 SPC cable? My v1 SPC recently started to turn green, maybe because it's rainy season here and hence the air became more humid.