Not a replacement for your audiophile in-ears, but a fine perfect sporty alternative. If you run, get a pair of these

These are great for working out or just about any activity, even traveling. Noise canceling feature and audio quality is very good, as you would expect from Sennheiser. Very balanced, with good bass. The ear fins make these impossible to fall out. Well designed product. Would highly recommend.

Sound quality; sport design

Nothing

if you run and want an incredible pair of earphones look no further i am an avid runner and have been searching for a long time these sennheier cx 680 hit it out of the park high quality all the way around the sound is astonishing and they dont move once placed in the ear wow how amazing is that buy

Comfortable; Compact; Durable; Good Bass; Good Value; Great Sound; Lightweight; Stylish

Cord Too Short; Without the volume contro

For those who are wondering what the extra pricing is for, let me clarify the points: 1.The cable is of extremely high quality and has great tensile strength. It is also waterproof and 100% sweat and humidity resistant.

Light, comfy and great sounding – a worthy winner of our favourite training buds

Keeping in-ear headphones firmly in place can often be a bit of a problem, especially when you're working up a sweat, so the earpieces on the CX 680 can be fitted with a pair of flexible rubber ‘earfins' that fold inside the curve of your ear and help to keep them secure.

Good sound quality; ingenious ‘earfins' designed specifically for runners

Cables can get tangled; microphone only on CX 680i model

Great Service by the vendor hats offf Superb I am highly impressed by the service the vendor has provided. Great

All in all, these headphones delivers on nearly every possible front. They have the looks. They're pretty cheap for a pair of good-sounding in-ear headphones. They don't fall out of the ear, thanks to the earfins, and they are quite comfy too. Their build-quality is really good.

Don't fall out; Great bass for a small earphone; Good detail level; Affordable; The clip works well for me so far; Good level of noise isolation; They look good; Feels pretty durable; They're sweat- and water-resistant

The "sporty" look might not be for everyone

Keeping in-ear headphones firmly in place can often be a bit of a problem, especially when you're working up a sweat, so the earpieces on the Sennheiser CX 680 Sports can be fitted with a pair of flexible rubber ‘earfins' that fold inside the curve of your ear and help to keep them secure.

This really is a great set of in-ear sport earphones. The noise cancelation is really good, I used it while biking and on public transportation too - had no issue with outside noise.

Great noise canceling; Sweatproof; Water resistant; Volume control

No mic; No Skip/Play/Previous buttons; Awkward volume control position; Symmetrical cord