Infinity-8 support system counteracts the breasts figure-of-eight movement during running. Soft, seamless inner reduces rubbing or chafing. Non-slip, wide padded adjustable straps. Reflective tape across cups for high visibility. Reflective tape across cups for high visibility. Full back opening for easy on and off. Made from moisture-wicking, breathable fabric, sports performance fabrics. Designed specifically for runners, the award-winning Ultimate RUN bra reduces bounce by up to 78%* and provides ultimate friction-free comfort.