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

Thinksport Safe Sunscreen ($15)

Lately, Sisson has been transitioning to mineral-based sunscreens. Her favorite so far: Thinksport Safe Sunscreen, which is free of harmful chemicals and water-resistant for up to 80 minutes. "I don't sweat it off — I can finish a run and still have a ton of sunscreen on my face," she says. The sweatproof factor is enough for her to look past the white cast that's nearly unavoidable with zinc-oxide sunscreens, and that she sometimes cuts with a tinted moisturizer.