I do own a set of the JayBird Blue Buds X, they are great.... when they fit right.
Sometimes you can't get the proper seal, but when you do they will never fall out.
Their sound quality is top notch for being Bluetooth, they are also really nice because they are light weight so making them even better for working out.
They best part is the the battery, on a full charge I am able to pull two days out of them, but in one day I can use them just as much as a normal pair of earbuds without worrying about their battery running out. They say that it has an 8hr battery life, but I can get more than 8 from them, maybe sometimes 10 hours on one charge.
Even if you work out, they won't budge? I hope not, because I owned another pair of IEMs, but they were such cheapo garbage that the moment I sweat, they'd fall right out, no matter how I wore them. They were terrible anyway, so I didn't bother getting Comply tips.
I'm using a pair of IEMs with tri-flange tips. They don't fall out with those on. I just would rather not have to deal with a pair of wired headphones if I didn't have to.