To all those women or teenage girls wearing tank-tops--STOP!!!
When you ride, WEAR A SPORTS BRA. I will say it again. WEAR. A SPORTS BRA.
If you think you look cute, that's great. But when you are 40 and your breasts are down to your knees, it won't be so cute then!!!
They make sports bras for a reason! Anyone who plays sports knows this. It is not for your comfort and it is not for the spectators--it is for the CARE of your breasts and to help them fight gravity. Regular bras do not give you enough support (if they did, I would have worn those when I ran track!). They make some with smaller straps if you INSIST on wearing clothes that look silly with sports bras, but pleeeease, for the sake of your breasts, wear a sports bra.
<3 End public service announcement, LOL!