Invest in your safety with the True Wireless Flash earbuds....

IPX7 Battery life Water-resistant charging case Ambient Aware for outdoor exercise

Bulky housings Lacks multipoint connectivity Finicky connection

Stay safe while getting fit with these true wireless sport earbuds.

IPX7; Battery life; Water-resistant charging case; Ambient Aware for outdoor exercise

Bulky housings; Lacks multipoint connectivity; Finicky connection

JBL and Under Armour bill their new True Wireless Flash ($170) as totally wireless sports earphones "designed for runners by runners." They're technically the first truly wireless earphones from the duo and as far as truly wireless sports earphones go, they're quite good, although some of their...

Under Armour's new Flash True Wireless earphones are fully waterproof, fit securely in your ears and sound good for true wireless headphones; They work well for making calls and have two transparency modes that allow sound to come into your ears for safety reasons

Charging case is bulky; and buds may be slightly too big for some people's ears

When it comes to wire-free earphones built for exercise, you can't do much better than the JBL UA True Wireless Flash. We're also big fans of the JayBird Run XT , which feature adjustable EQ, but we're giving the Flash our Editors' Choice for longer battery life and a slightly more exercise-focused...

Powerful bass-forward but balanced audio performance; Solid mic clarity; Strong battery life; Waterproof; Includes one year premium membership to MapMyRun

Cuts off beginnings of newly navigated-to tracks and phone prompts; Minor hiss at low volumes

True wireless headphone offerings are more diverse than ever, but it still takes the same key things to make a great product. We want to see five hours or more of listening time, a comfortable design, and waterproofing for when we take them to the gym or out in the Portland rain.

Comfortable fit; 5-hour battery life; 24-hour charging case; Great passive noise isolation; Fully waterproof

Bulky charging case; Audio lag with mobile video

With solid sound and a crazy good fit, these true wireless buds are a good deal, especially considering that they're cheaper than the AirPods, which don't fit as snugly and fail to isolate sound.

I am a runner and I wear these for the runs, although they seem steady in the ear mostly during the outdoors run, when I run on the treadmill they seem to be unsteady. There is the other issue of buds completely closing the ear when you press a bit deeper, feels like your eustachian tube is closed,...

Very surprised at how good they sound. Out of the box, I charged them and then played Muse's Knights of Cydonia from their Live In Rome album, and the song had deep bass and clear highs. This is the first pair of wireless earbuds I've owned, and they are solidly built.

Amazing sound; waterproof

Need to wiggle them a little to secure them in the charger; but no big deal

After first use, the left earbud would not turn on or pair again. I see it turn red light when its put in the case. But it wont link to the right earbud and wont play anything through it.

The JBL Under Armour True Wireless Flash do hold some attraction. They're the first water-resistant true wireless earphones I've seen from a major manufacturer and, for that, both JBL and Under Armour should be commended.

IPX7-certified water resistance; Sporty; rugged design; Decent battery life

Sound lacks refinement; Charging case is bulky; Fit isn't very secure