The 4 Best Sports Bras for Size C/D

Great sports bras are more than mere garments. They're engineering marvels that can help runners extend their workouts, improve running form, and even avoid injury. Researchers at the University of Portsmouth in England found that excessive breast movement can result in heavier, injury-promoting landings. But a properly fitted bra can reduce breast bounce by half, making it one of the best investments a runner can make. Happily, our team of a dozen sports-bra testers—who ranged in size from 34A to 36DD—analyzed 49 different bra models and discovered that the top performers don't always command top dollar.

In addition to C/D shown here, we also reviewed A/B and D/DD.

TESTERS' FAVORITE

Everything about this merino wool bra delighted its testers, from its flattering shape to its superior comfort. The fabric is soft, the neckline is high enough for containment (but not too high), the adjustable bottom band and shoulder straps provide a customized fit, and nonstretchy, molded cups let D-cup testers run long with minimal bounce. $80; 34B-38C

BEST VENTILATION

Two sets of clasps (on the bottom band and upper back) make this bra more onerous to put on, but once testers started running, they ranked it tops for both support and ventilation. "It's light and airy, and I did not experience any chafing or bounce at all," said one tester. Another tester even found relief from chronic soreness in the shoulders. $79; 30A-38I

MAX ADJUSTABILITY

Choices, choices: The straps convert from vertical to crossback, the modesty pads are removable for improved breathability, and the adjustable rib cage band and straps dial in a comfy fit. The meshy neckline is both flattering and ventilating, but testers wished for softer seaming on the bottom band. $55; 34B-38D

BEST VALUE

"I was able to focus on running without worrying about bounce," said one C-cup tester, who praised this bra's ability to keep her feeling cool and dry throughout her runs and circuit-training classes. Soft fabrics and seams work together to prevent chafing, and the sturdy straps look cute, not brawny. $48; XS-XL