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

New Balance Performance No-Show Socks ($14 for a 3-pack)

"I'm a millennial, so I like the socks that come just below my ankle," says Sisson. Lightweight socks made of performance fabric are key for long runs to avoid blisters, and Sisson says these New Balance options more than fit the bill. "They're lightweight, I don't get blisters, they don't fall apart," she says. "And they're just comfortable — I don't really notice they're there."