Our heart rate monitor arm strap is made of the latest material, which is not easy to fade, practical, lightweight, soft, elastic, and better protects your skin.This replacement strap is compatible with most sensors, such as OTF OTBeat FITCENT Wahoo Powr Labs XOSS LIVLOV Optical Heart Rate Monitor and Fitbit Sense Watch Orange Theory Fitness VorTec and more brand heart rate monitor.This replacement strap adopts an adjustable design principle, which is flexible and adjustable, and can adjust the length according to the size of your arm. It is the ideal choice for most women, men, boys, and girls to wear. The heart rate monitor replacement band can be worn either on the wrist or on the arm, suitable for many activities, such as rock climbing, cycling, jogging, yoga, running and mountain climbing, allowing you to focus more on your exercise.