for small chested women

Lululemon Athletica Flow Y IV

The ultimate overachiever: A mesh insert wicks sweat from your upper back, flat seams eliminate chafing, and a secret iPod pocket keep hands free.

Under Armour Seamless Essential

Signature Moisture Transport System wicks sweat to keep you dry and light, power rib support on inner layer provides extra stability. Slim adjustable elastic straps with modified racer back for range of motion. Best for A to C cup sizes.

Moving Comfort Alexis

A consistent favorite amongst smaller-chested exercisers: slim straps, so it doesn't feel bulky and uncomfortable, and adjustable straps.  A-C cups will find the Alexis a good choice for higher impact activities.