Delivering a smooth, responsive ride, Nike React foam makes a comfortable, cushioned base that feels lightweight and springy when you kick into high gear for cardio and sprints. Grippy rubber wraps around your arch during intense rope climbs. Rubber tread gives you traction and helps you stay on your feet when transitioning from the training room floor to the pavement. The wide, flat heel gets even more stable with an inner plate that distributes weight from edge to edge. It also flexes to make it comfortable for cardio and sprints. Lightweight mesh with textured overlays in high-wear areas helps keep your foot cool without sacrificing durability. Tab locks down the laces with a hook-and-loop closure to help keep them out of the way. Handstand clip at the heel helps minimize drag during wall exercises. Grooves in the sole let your forefoot bend naturally.