What do I need to know about impact level?

Depending on your size, best practice is to have a bra for each impact level.  Low impact activities, such as flow yoga or hiking, may only require light support.  High impact exercise, however, demands a greater force on the body.  A more supportive sports bra is required for high impact activities, such as running or aerobics, to protect Coopers ligaments and minimize movement.  Check-out this blog for additional tips.