Compatible with Polar:
Polar models averaging 7-8 years old or older. Check the connector shape before purchasing. (Transmitter not included)
Sizing Choices: Measure just under the breasts/chest area
Small (12 to 14 inches)
Have an extra strap for when the other strap is in the wash, for another user or if your elastic strap is showing wear.
This strap is NOT compatible with T31 coded and non-coded chest transmitters and any T series exercise equipment.