- Compression bras press your breasts against your body and are most often found in classic pullover racerback styles. (Think uni-boob!) - Encapsulation, on the other hand, gives you extra support from underneath--think of the traditional support you get from an everyday bra. - The gold standard (and the key for getting good support for D-DD and up) is to find a sports bra that provides both compression and encapsulation support.