I was asked by a (female) work colleague, the following question, verbatim: "How do you run the triathlon with such big tits?" Good question, Marnie! This sports bra, by Moving Comfort, is awesome, and I consider it to be my secret weapon during training. It has adjustable velcro shoulder straps that eliminate any/all bounce while running. I've always been a bit worried, however, about how that velcro might hold up during the swim portion. I'll have to do a little experimentation over the next few weeks to see if the velcro stays tight both during the swim (and see how comfortable it is to swim in), and if it can then handle the run while still wet. During my past races I've worn a Champion Double Dry Seamless sports bra with a tri top over it; the tri top (like this one) has a built in shelf bra that helps out a bit as the Champion bra isn't as supportive as the Moving Comfort one. The key — test out all your clothing BEFORE race day!!