"As a small B size, this tight FP Movement Happiness Runs Tank ($30) doubles as a bra for me often! I absolutely love the length of it (it's more of a crop, so a bit longer than other bras), and because of the thicker, body-con material, I'm able to wear it as a bra. The high neckline and racerback cut are aesthetically appealing, too. I find it wicks sweat well and never really weighs me down. Plus, it can double as a tank if you have to go from workout to coffee, brunch, or errands." — AS