The headphones do not bleed a click track into a live microphone

When I scrolled down to the bottom of the page and found that they had several white noise MP3 tracks available for download, I knew the promise of "Extreme Isolation" was too good to be true, and I decided to pass

Use this to get clean vocal tracks.

I would stay away from these, as it's really easy to find much nicer professional headphones with longer warranties that aren't constructed poorly starting a moderately higher price than what these cost