moofit Heart Rate Monitor Armband with Bluetooth & ANT+, Waterproof Optical Heart Rate Sensor Work with Zwift, Wahoo Fitness, Endomondo, Peloton, iCardio and More (HW702) : Amazon.co.uk: Sports & Outdoors
Review: Peloton Heart Rate Band can be worn on the arm
COOSPO Heart Rate Monitor Armband,Bluetooth ANT+ Armband Heart Rate with IP67,Optical Heart Rate Monitor for Peloton,Strava,Zwift,Polar Beat,DDP Yoga(One More Bands) : Amazon.co.uk: Sports & Outdoors
Magene H803 Heart Rate Monitor Armband, ANT/Bluetooth Optical HR Sensor Compatible with ZWIFT STRAVA Peloton and Other APP, Suitable for Running Cycling Yoga and Other Sports : Amazon.co.uk: Sports & Outdoors