Nails that are too short can be just as bad as ones that are too long. Long nails will bump against your sneaker, bruise, and turn a lovely shade of black, but overly clipped ones may become ingrown and infected. Be sure to cut straight across the edge of the toe.
[sidebar]ROUGH IT UP
Never razor or overfile calluses. "Calluses grow for a reason," Phoenix says. "They’re protecting your pressure points." File them gently to remove dead skin.
DITCH THE CHEMICALS
Regular polishes often contain two known carcinogens. Choose healthier, eco-friendly polishes from brands like Zoya and Nubar instead.