Heavy duty version is recommended for high impact sports

No Slip - Special grip coating is used to construct the frame and eliminate slippage when sweating

Elastic back waist

These women's running shoes are designed with an engineered knit upper for structure and high-rebound FuelCell technology for underfoot propulsion

Additional perforations around the knees keep things optimally ventilated

Unisex Nike Zoom Rival Distance US Men's Size (Women's):4.0 (5.5) Heavy duty version is recommendedWith a lightweight, breathable upper and cushioned midsole, this adaptable spike dials you in for a wide range of middle and long distance races. It takes learnings from the game changing Dragonfly spike to give you efficient energy return for the tough middle laps and top end speed as you kick into the homestretch. Cushion for the Push Added cushioning at the midfoot and heel give you the comfort needed for longer distances and a smooth, propulsive