With the Sennheiser Momentum Sport Black, you can be completely immersed in your workout. You can listen to music as well as measure your fitness activity thanks to the built-in sensors. These sensors measure your heart rate and body temperature. This way, you can keep an eye on how you perform during your exercise. The IP55 certification makes the earbuds water-resistant, which means you can also use the earplugs during rain and they can withstand sweat. The earplugs fit securely in your ears during your exercise thanks to the included ear fins. Sennheiser provides 4 sizes of ear fins, so there's always a pair of ear fins that suits the shape of your ears. Want to isolate yourself from your environment during your workout? Thanks to active noise canceling, you can hear less of your surroundings and focus on your activity.