Designed specifically for runners, the award-winning Ultimate RUN bra reduces bounce by up to 78% and provides ultimate friction-free comfort. 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. Full back opening for easy on and off. Made from moisture wicking, breathable fabric, sports performance fabrics. University of Portsmouth 2009 Scurr et al testing carried out against no bra conditions.