Is the Vertigenius™ Head Sensor water-resistant?

The device has an IP22 rating, meaning it is resistant to water spray and touch but should not be submerged or exposed to heavy moisture.

Water spray & touch resistance (IP22)

Your head sensor is a sealed unit, protected against ingress of dust and water droplets, but not running water, which means it is designed to be worn in all daily life situations. The water and dust resistance means you do not have to worry about your head sensor getting wet when it rains, or if it comes into contact with sweat. Before charging the head sensor make sure to wipe off any moisture.