Review on COOSPO Bluetooth & ANT+ Heart Rate Monitor Armband - Optical HRM Sensor, Waterproof IP67, Fitness Tracker Armband Compatible with Zwift, Wahoo Fitness, Endomondo, Peloton - Includes One Extra Free Armband by Takeshi Krzywicki

I finally found a solution I like for heart rate measurement when mountain biking. I first tried my HR fitness watch, but it gave inaccurate readings when I rode over uneven surfaces. Next, I tried a chest strap that I used to use for running. It was true, but I found it uncomfortable. So I decided to buy this bandage. At first I thought it would be impractical to undo and reattach the velcro every time. But then I realized I could adjust it to a fixed size so it barely slipped on my wrist. Then I just slip it up my forearm until it's a snug fit so I never have to deal with Velcro straps exceeding the original size. This is fairly easy as the material is a slightly stretchy neoprene fabric. The bottom line is that it is comfortable to wear and use and provides accurate results. It was easy to pair with the CooSpo bike computer and my iPhone 12.