As has been stated by others great looking bit of kit as long as you dont get in a sweat, had these for about a year as a present for my son who never used them so he gave them beck to me to use in gym, second time I used them they gave out while I was on jogger (thought it was battery) but when I got home the computer would not do anything with them.
thouht Id lost driver or somthing lucky I found out about this problem and contacted Sony, who have streight away said they will replace it, good on them, so now Im waiting to see how these new ones will stand up to a workout.