AudioFly Performance Series in-ear monitors (AF-120) with Snugs buds – as used by The New Union, Dub Pistols and Dave Smale of the Yardbirds and reviewed by HiFi Headphones.co.uk:

http://www.hifiheadphones.co.uk/reviews/audiofly-performance-series-in-ear-monitors-and-snugs-ear-docks/

See their Testimonials on YouTube:

The New Union:  http://youtu.be/dPR1xzty_1g

David Smale, Yardbrirds;  http://youtu.be/m-G2cTFWb74