Runner's World says the Handful Y-Back Bra is "the right bra for C to D cups who need a little extra support." It offers secure support for running and other high impact activities.  If you are in the market for a high impact racerback sports bra you should give the Y-Back Bra a shot.

Product Details:
Secure support for high impact activities
Removable Lights Out™ Pads
Wide band and straps for secure support
Smooth, non-chafing, quick-dry fabric
Center front ruching shapes and keeps bra close
Y-back design keeps straps securely in place
Soft, moisture-wicking COOLMAX® lining

Care:
Wash with pads. Do not invert pads. Machine wash cold, gentle cycle with like colors. No bleach. Hang dry or tumble dry low. No dry clean. No iron.

Fabric (Purple Reign):
shell: 78% nylon, 22% spandex 
lining: 43% polyester, 43% coolmax, 14% spandex 

Fabric (Black):
shell: 77% polyester / 23% spandex
lining: 91% polyester / 9% spandex