negro Nike Dunk MULTI-SURFACE TRACTIONThe Nike Zoom Rival XC Men's Track Shoe is perfect for the unexpected terrain of a cross-country course. It boasts a classic Waffle outsole and targeted flex grooves for durable traction and a natural ride.BenefitsFlywire technology locks your foot downPhylon midsole offers lightweight, responsive cushioningRounded heel for natural range of motionDual-layer mesh upper with no-sew overlays for ventilation and supportDurable rubber Waffle outsole with four spikes for tractionFlex grooves for a smooth transitionProduct DetailsLugs around the perimeter have a sharp, crisp shape to enhance grip in all conditionsWeight: 7.6 ounces (men's size 10)