There are plenty of flowers for those who can laugh at the rain. With Air Zoom units and side-to-side stability, the GP Challenge 1.5 is made to unleash your inner might and help you weather whatever storms come your way. Design: Heel designed for rocker-like movements, like pulling back for a serve Added gusset to the tongue to keep it from sliding to the side during the heat of play 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 sort of "hugged" containment when moving side-to-side The heel is extra padded to help keep you comfortable and supported In-Shoe Comfort: 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 Adjusted to the Air Zoom to give you a little more freedom in the forefoot compared to the original GP Challenge Durability & Traction: 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 Extra rubber in the toe area, specifically the big-toe side, adds durability High-abrasion rubber in the forefoot offers durability and traction Additional Details: Tested on red-clay courts in Europe in multiple clay-weather conditions (cold, warm, wet and dry)