[Compatibility] The chest strap can be used with the most popular heart rate monitors and sensors, such as Garmin, Polar, Wahoo, Coospo, etc. [Adjustable size] The wearable size ranges from 65 cm to 95 cm, and the maximum stretch is 130 cm. The distance between the two snaps is about 45mm. [Comfort] Our strap is made of a mixture of silicone and fiber, and is designed for more than 10 hours of comfort. The fabric of the strap can be removed and hand washed as often as needed. [Reliability] Changing the chest strap can enhance and extend the life of the sensor. The electrode zone can quickly get your heart rate date, provide a stable connection and accurate data to help you maximize your exercise. If you exercise regularly, we recommend that you prepare an extra strap for replacement. [Reminder] Sometimes due to battery and signal problems, the problem may be on the chest strap. You only need to replace the strap to solve the problem. We recommend that you change the strap regularly.