NIKE Zoom Rival MD 7 Running Spikes Synthetic Plastic/Rubber sole Dynamic Fit Technology - Wraps the arch from under the foot for a glove-like fit and lockdown. Mesh Throughout the Quarter Panel - For excellent ventilation in a lightweight package. Minimal, Lightweight Tongue - Made of sandwich mesh for enhanced breathability. EVA Sockliner with Graphic - Conforms to the shape of your foot for comfort and underfoot support. Pebax Plate - With seven spike receptacles and minimal secondary elements for maximum power, speed and traction.