The racerback design provides added support and helps to distribute the weight of the breasts evenly, reducing strain on the back and shoulders. The built-in molded cups provide lift and hold, which can help to minimize bouncing and discomfort while running. Additionally, the adjustable straps and back closure allow for a personalized fit, which is essential for ensuring that the bra stays in place and provides optimal support during physical activity. Overall, the Dare Racerback Run Bra 2.0 seems like a great choice for runners who want a high-impact sports bra that is both supportive and comfortable.