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. Features: racer back, non-padded, non-wired sizing tip: this style can come up small_We find it best to try a band size up from your normal size. This means if you normally wear a 34d, we recommend trying a 36d.