I bought these headphones because of the special holding mechanism. In my previous sports "in-ear" are simply fell out when I started to sweat (oh yes, I'm sweating heavily). The CX-685 stop here quite better, but not as good as hoped. In an hour-long workout I have to bring 5-10 again in position they certainly. Here's a tip: If you take it out shortly, ear dabbed dry and the headphones dry dabs, they last longer. For this reason, a star deduction had hoped the more stamina. But, as I said: I sweat heavily and have relatively large ears.
For sound: Impeccable. Of course, it must have the right papers are selected (the biggest for me), as with any in-ear headphones. Depending on the playback device, it lacks a bit of bass, but I like to write more the reproducing apparatus for the headphones. With my little Sony Bluetooth receiver they harmonize hervoragend.
Would I buy it again? From the sound of her: yes. From the satisfaction in sports: No.
