Run stronger and faster with focused precision. The X-BIONIC® EFFEKTOR 4D RUNNING SHIRT SH SL WMN combines Effektor® Technology for optimal 37°C temperature regulation with the 3D Bionic Sphere® System and ThermoSyphon® to enhance sweat management. Neural-Response-Effect boosts muscle performance and endurance, keeping you light, dry, and empowered to conquer longer distances—designed specifically for expert women runners in spring and summer.