COROS Heart Rate Monitor Sandals Knit upper with zonal venting:

Knit upper with zonal venting: Affords breathable comfort

choice of sizes from XS to XL and a wide design

the jacket self-stuffs into the left handwarmer pocket with a carabiner clip-in loop

breathable and durable materials built for in and around water

Stretch woven fabric

COROS Heart Rate Monitor Sandals Knit upper with zonal venting:HRM GRY Comfortable and simpler to wear than a chest strap. Easy to adjust the fit and remove the sensor for quick cleaning. Our latest multi channel optical sensor for precise measurement. Up to 3 simultaneous connections with Bluetooth enabled devices. Wear detection allows for automatic device pairing for new workouts. 38 hours of full operation or 80 days in standby mode on a single charge. Rechargeable with a magnetic USB charging cable. PRECISE