Sony XBA65 Premium Quality In-Ear Headphones - Black

After only a couple of months, the tiny leaf springs in both side broke. These earphones are clearly not robust enough for outdoor use.

In short - DON't BUY THESE! I used them maybe twice a week for running for a couple of months, they were well looked after and kept in their case but both sides broke in exactly the same fashion within a week of each other.