Champion Double Dry Seamless Full Support Underwire Sports Bra ($40; championcatalog.com)
Adjustable straps and a hook-and-eye closure created a custom fit for both our C- and D-cup testers, giving them great, comfy support during walks and runs. We also like: Under Armour Premiere 2 ($41.99; underarmour.com)
Under Armour Movement Bra ($39.99; underarmour.com)
Stretchy polyester and a racer-back style made this bra plenty supportive for our B-cup tester’s walks and runs without creating bulges in the wrong places. She also loved the flare of the extra shoulder strap. We also like: Adidas Response Bra ($36; shopadidas.com)
Isis Seamless Sport Bra ($34; isisforwomen.com)
The racer-back style kept the straps of this soft bra in place during our A-cup tester’s running, biking, and strength-training sessions. The built-in shelf bra offered ample support without covering too much torso. We also like: Adidas Supernova Crop Top ($38; shopadidas.com)
Lululemon Athletica Deep V Bra With Cups ($36; lululemon.com)
This bra’s chafe-free flat seams and stylish crossover front performed flawlessly through the rigors of our B-cup tester’s long weekend runs. And the bra didn’t ride up, even on her tall, slender frame. We also like: New Balance Tonic 2.0 Crop ($30; newbalance.com)
Hind P.S. Support Bra ($42; hind.com)
With its snug-fitting front and breathable back, this bra gave our tester ample C-cup coverage and support without being bulky around her slender frame. The flat seams didn’t chafe during running or yoga, either. We also like: Hot Chillys Salsa Seamless Women’s C–D Tank Bra ($32; hotchillys.com)


