The X4s are a refresh of the company's older Jaybird X3 wireless headphones. The only significant changes are their improved IPX7 water/sweat proofing, redesigned tips and ‘Speed Cinch' cord management system, which, according to Jaybird, will provide users an even more secure fit.

Solid; comfortable fit; Decent sound for a sports set; Great build quality

Prone to dropouts in busy areas

I don't leave reviews often, but these headphones are just so underwhelming. Bluetooth drops in and out. Sounds quality isn't that great (especially for $130). Battery life has dwindled after a few months of use. Just overall unsatisfied with these.

Out of the box I was very excited to receive these headphones. I purchased them with the express purpose of utilizing them in conjunction with my Peloton spin bike. It was difficult to get the Peloton to recognize and then sync with the headset at first; but once I crossed that hurdle everything...

Packaging -Aesthetics

-Sound quality is marginal -Depends on your use Syncing is poor -Jaybird Support is terrible -Charging cord is ridiculously short and the connection is troublesome -Control Location is right up against your head and difficult to reach / use

These headphones are in my opinion the best wireless sport headphones there are. Only problem, and this is the only reason for the missing star, is that they are not grey. They are green. Still it's the sound I wanted

It's early days for me but having tried them out for the first time using the included comply foam tips is that these are very comfortable and securely fitting earbuds with great sound.

Is what it says it is, excellent sound quality.

In the X4, Jaybird solved some of the biggest issues that people complained about in the company's previous models. With that, we really appreciate Jaybird for listening to their customers' feedback. In fact, there's a lot of improvement in these earbuds.

REVIEW – I'm on a mission to find my next favorite pair of Bluetooth earbuds and so far I've been focusing entirely on truly wireless earbuds, but in reality, if I had to pick a pair of Bluetooth earbuds that sound the best and fit the best, the ones I'd pick are not completely wireless.

Good sound quality

A confession: I gave up on my previous pair of Bluetooth earbuds, Jaybird's own X2, after about a year. It wasn't their fault; they sounded good, they were comfortable, and the battery lasted long enough.

Sound quality The X4 sound really good; There's surprising oomph to the bass, New fins The updated fin style is more flexible and easier to keep clean than previous versions, IP rating They're safe in up to a meter of water for as long as 30 minutes

Goofy proprietary charger I'm more bothered than most by single-purpose cables and adapters, but come on; The charging clip is even worse than the X3's, New cinch A single cinch for adjusting the wire between the earbuds is simpler, but it negatively impacts the fit compared to the double cinch...

If you reside in an area bustling with athletic activity or you often visit the gym, you will realize one thing in common with the runners, weightlifters or strollers. They have headphones on.