JBL UA / Under Armour True Wireless Flash

Powerful, bass-forward audio performance ; Long battery life ; Waterproof design ; Ambient Aware listening modes ; Includes 12-month MapMyRun membership

Charging case is on the bulky side ; No app with EQ or settings adjustments

The waterproof, exercise-friendly JBL UA True Wireless Flash X earphones offer a bass-forward audio experience paired with excellent battery life.

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.

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...

Durable and stable fit for sports.;Good audio reproduction.;Great passive isolation performance.

Very high latency.;In-ear fit might not be for everyone.

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

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

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.

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...

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

The UA True Wireless Flash is an excellent set of truly wireless earphones -- except for its bulky charging case.

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...

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

The UA True Wireless Flash is an excellent set of truly wireless earphones -- except for its bulky charging case.

The UA Sport Wireless Flex by JBL is a well-designed neckband-style Bluetooth sports headphone. It's sweat-resistant, fits comfortable and securely and sounds good for the breed. The buds adhere magnetically and there's an LED light strip built into...

It's a bit too expensive. Under Armour and JBL should throw in a set of larger eartips to ensure more people can get a tight seal.

While it costs more than competitors, the UA Sport Wireless Flex by JBL fits well, sounds good and should please runners and players of other sports, especially if they exercise at night.

The UA Sport Wireless Flex by JBL is a well-designed neckband-style Bluetooth sports headphone. It's sweat-resistant, fits comfortable and securely and sounds good for the breed. The buds adhere magnetically and there's an LED light strip built into...

It's a bit too expensive. Under Armour and JBL should throw in a set of larger eartips to ensure more people can get a tight seal.

While it costs more than competitors, the UA Sport Wireless Flex by JBL fits well, sounds good and should please runners and players of other sports, especially if they exercise at night.

Snug fit that’s great for workouts; Bold audio performance; Ambient sound amplification modes; Decent battery life

Clunky battery charging case; Latency when watching video; Single audio profile that’s bassy