The GP Challenge 1 helps you serve and swing with confidence. With Air Zoom units and side-to-side stability, it's made to unleash your inner might and smash whatever comes your way when it's match point. Red-Dirt Ready - Nike Claybreaker technology helps give you enhanced traction and less buildup on clay courts. Added grip in the forefoot and midfoot work with a wide traction pattern to help you slide with control. We used traction maps, pressure maps and analyzed clay buildup areas for the design. Then we tested it on red-clay courts in Europe in multiple clay-weather conditions (cold, warm, wet and dry). Durable Traction - Extra rubber in the toe area, specifically the big-toe side, adds durability. High-abrasion rubber in the forefoot offers durability and traction. The heel is specifically designed for rocker-like movements, like pulling back for a serve. Zoom, Zoom - A forefoot Air Zoom unit helps you play on your toes and puts a pop in your first step. A heel Air Zoom unit provides support. Stay in Motion - A strong midfoot plastic plate adds stability for quick cuts and power to your game when transferring energy from motion to motion. Webbing around the eyestays combined with the plate offer a -hugged- containment when moving side-to-side. The heel is extra padded to help keep you comfortable and supported. Product Details - Designed for wear on clay and padel court surfaces. Cushioned insole.