Sennheiser IE 100 PRO Clear Live In-Ear Monitors
They sit in the ear very well, and are surprisingly comfortable, with the bendable over-ear part of the cable holding the monitors re-assuringly in place. Unlike basic ear buds, which I hate, these in-ear monitors are not pushed 'hard in' to the ear, they just fit comfortably and firmly in the ear.
Overall, these are fine monitors, and should suit all types of music and musicians.