Unrivalled Sennheiser sound: Boost your performance with the high-quality Momentum Sport sound with more powerful bass. Adaptive ANC: Stay on track without distraction, even in noisy gyms or busy outdoor locations. Integrated biometric sensors: Accurate measurement of heart rate and body temperature (BT) through precise in-ear sensors. Connectivity with the sports ecosystem: Compatible with leading sports watches, apps and fitness devices thanks to Bluetooth. Semi-open design for more comfort: The acoustic relief channel allows air circulation, which increases wearing comfort, reduces structure-borne noise and improves natural perception. Powered by Polar: Full Polar integration and free access to Polar Flow for seamless tracking of your most important biometric data. Secure fit for any sport: Interchangeable ear fins and adapters allow for a secure, customised fit with lasting comfort during long training sessions.