14 Products Every Marathoner Should Own, According to Pro Runner Emily Sisson

New Balance Sleek Medium Support Pocket Sports Bra ($50)

"I don't often run with my phone, but if I'm running somewhere new, like when I was in Europe, I want it on me in case I get lost," she says. This New Balance bra has a perfectly-placed phone pocket in the back that she says comes in clutch in those moments, and is a great alternative to putting your phone in your pocket, where it can bounce, or in a belt, which can be cumbersome. Even when she's phoneless, she loves the Sleek line of bras for their no-chafe comfort.