The replacement chest strap for your Suunto Smart Heart Rate Belt. Also compatible with the Movesense Sensor. This item does not include the transmitter. The chest strap is fully machine washable (remove the module first). This black belt is size L and suitable for 96-160 cm / 38-63" chest circumference.This belt is also available in sizes S and M HIGHLIGHTS For use with Suunto Smart Heart Rate Belt and Movesense sensor