These are the Nike GP Challenge 1 clay court tennis shoes. They feature Nike Claybreaker technology with enhanced forefoot and midfoot grip and a wide traction pattern designed for clay court slides and sprints. A forefoot Air Zoom unit supports toe-off and first-step responsiveness, while a heel Air Zoom unit provides cushioning and support. The outsole is designed to minimize clay build-up and maintain traction in cold, warm, wet, and dry conditions.