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Finding a pair of headphones for running can be trickier than it seems. In-ear headphones have a habit of working their way out of your lugholes as you pound the pavement, and models that sit in a loop around the back of your head can be uncomfortable if they move around on your neck too much.
Sennheiser reckons it has the answer with its Adidas-branded OMX 680i Sports earphones. They use adjustable ear hooks to stay in place as you run. They're not too pricey either. You can buy them online for around £35.
The 680is look garish, due to the neon yellow that Sennheiser has used on the cable and the face of the earpieces. The ear hooks, inline volume control and jack plug are black, though, which provides some balance. The neon colour does make these headphones look sporty too.
Sennheiser says the cable is made from Dupont Kevlar for added extra strength and durability, so it shouldn't snap the first time you snag it on something.
No noise isolation
The earpieces sit on the outside of your ear, rather than nestling into the canal. This means they don't isolate noise, so you can hear some ambient sound around you when you've got your music playing. If you're running on roads or streets, this is probably safer than being totally cut off from what's happening around you.
The earpieces have a rubberised coating that helps protect them against sweat and rain, but they're not fully waterproof, so you can't jump in your local swimming pool with them on.
Sennheiser supplies swappable ear sleeves in small, medium and large sizes, so you can choose the option that best suits your ear size. We found the larger size worked best, creating more of a seal around the entrance to the ear, boosting perceived bass performance, and blocking out slightly more background noise than the other options.