In ear head phones.
These offer that bit extra in volume then MDREX32 range the design is is similar to the rubber gromets of the mdrex32 which stops them from falling out of your ears. The strange shape allows the bit inside your ear to stay secure and allowing fexibilty for you to move. These are worth the extra premium if your jogging or at the gym, the fit is better and the extra volume allow you to counter act external noise. choice of black also available.