Polar Pro Chest Strap Set (Black, XS-S)

Polar soft strap the Polar soft strap is the most comfortable chest strap for measuring your heart rate. Comprised of soft fabrics covering the adaptive sensor, the strap is extremely sensitive to your heart's signals, meaning that readings are quick and accurate. Compatible with all Polar heart rate sensors that use the snap attachment method. Size XS-S fits a 20-26 inch chest.