Firstbeat Electrodes Ambu BlueSensor L
The large Ambu BlueSensor L features highly conductive wet gel, offset connector and a combination of instant and long-term adhesives for excellent contact and stable signals throughout the monitoring period. Ambu BlueSensor L electrodes work well with Firstbeat Bodyguard 2 resulting in accurate monitoring and comfortableness in use.
More info on Ambu's website.
Single use ECG electrodes for Bodyguard HRV device.