Ladies, if you've ever worn a chest strap heart rate monitor together with a sports bra, surely you've contemplated merging the two. Many sports brands have done just that, including fitness tech company Sensoria, with its Sensoria Fitness Sports Bra ($89, direct; heart rate monitor sold separately). You can snap any supported BLE heart rate monitor onto the front of the bra at the breastbone, and the textile electrodes sewn into the bra detect your heart rate and feed it to the heart rate monitor. Pair the monitor and bra with your favorite compatible exercise app or runner's watch, and you're ready to go.

The Sensoria Fitness Bra fits snugly, like a compression bra, and is made of 48 percent polyamide/nylon, 47 percent polypropylene, and 5 percent elastomer/Spandex. (A similar t-shirt for men, $89, is also available.) On the underside of the lower band are the textile electrodes, the signature feature for Sensoria. They look like two squares of gold thread and felt imperceptible when I wore the bra to workout and ride my bicycle.

Based on my body measurements, I don't fit perfectly into a small bra (32-34 A or B) or a medium one (34-36 A or B), so I tried both. The small felt way too tight in the arm holes, of all places, and restricted my upper back. It felt like it was changing my posture and pinching my armpits. The medium size was marginally better, but still a lot snugger than any other sports bra I've worn. A large supposedly fits bra sizes 34-36 C or D (also not my size). If you're interested in this bra, definitely size up.

I first tried snapping on a heart rate monitor from PEAR Training-Intelligence, but it wasn't compatible. The signal wasn't transmitting through the bra. I'd never know it wasn't compatible from the Sensoria website, however, which only reads, "compatible with brands such as Garmin and Polar." The company, Heapsylon, has said it also works with Zephyr and in private communication told me it's "compatible with any electronic/HRM that has 4.5cm distance between the snaps" (which should have included the PEAR device).

At any rate, Heapsylon sent me a new, "generic heart rate monitor" (the company's words, not mine), which I paired with two different mobile apps, Runtastic and Strava, to make sure it worked. You'll need a Bluetooth Smart device on the receiving end for app compatibility. I had great results with both. However, the company really needs a detailed list of which heart rate monitors are supported. Without that, it's very tough to make a purchasing decision.

The back of the bra is one expansive piece of fabric, which isn't ideal if you like a little more skin exposure for your sweaty back. A lot of other sports bras, including a Lululemon model that also has a heart rate monitor attachment, have a more fashionable design that gives the skin better air exposure, while also not restricting the upper back so much.

Chest straps are fully adjustable, though. If midway through a run you feel you've wrap it on too tightly, you can always loosen the band. The Sensoria Fitness Sports Bra, which comes in small, medium, and large sizes only, doesn't adjust. Some sports bras (such as this one from PureLime) have three rows of clasps on the back, similar to a standard bra, that allow you to loosen or tighten the bottommost band slightly. The addition of a couple of clasps would make the Sensoria bra far superior than it is now. When the fit is just too tight around that lower band, the two sensors directly behind the heart rate monitor snaps leave deep imprints in your skin.

Eighty-nine dollars seems quite steep for a sports bra. Most high-end sports bras (including ones with heart rate monitors) top out around $80, and at that price, I expect at least more choices in color. Even at $55, the Adidas miCoach sports bra with heart rate monitor comes in five colors.

I'm also not a fan of the Sensoria logo, which appears on the front as a big green 'S.' From afar, anyone catching a glimpse of that 'S' would assume it stands for "small," because that's what 'S' on clothing means. And let me tell you, most women don't want to advertise the petite nature of their bosoms.

If you want a compression sports bra with heart rate monitor attachment—and particularly if you're small—the Sensoria Fitness Sports Bra might a good match. But it's still on the pricey side, and without a detailed list of supported heart rate monitors, it's hard to recommend.