Still new, but have worked very well while running, doing yard work, and just sitting around. Will see how well they stay in the ear as the weather warms up with increased sweating.
Sound is very good, I am pleased how well they give the needed clarity and punch to the music, especially when running.
C5 noise-isolating in-ear headphones bring you amazingly natural acoustics and fit so comfortably and securely you'll hardly be aware you're wearing them. Our unique Micro Porous Filter system makes sure that sound is open, spacious and full of rich, lifelike detail. So you can truly lose yourself in unadulterated sound, even when you're on the move.
They feature our innovative Secure Loop design - loops of plastic-coated wire that curl around the inner rim of your ears and hold the in-ear headphones firmly in place. The C5s are also Tungsten Balanced, meaning that the headphones are weighted towards your ears, rather than away from them, for optimized noise isolation.
C5's MFI remote and microphone make the headphones the perfect match for your iPod or iPhone. They also come with a quilted carrying pouch.