Sensor pad for wearable garments

A sensor pad is provided. The sensor pad comprises a first layer and a second layer of padding material, each having an inner face. The inner face of the first layer is provided with a first printed conductive ink track and the inner face of the second layer is provided with a second printed conductive ink track. At least one of the layers is provided on its inner face with a plurality of raised portions between adjacent runs of the printed track to provide a spacer layer across the sensor pad, which improves the ability of the sensor pad to return to a pre-impact configuration following an impact. The plurality of raised portions maintain the two printed tracks apart when the sensor is unstressed but allow localised contact between the first and second printed tracks when pressure is applied to the sensor pad.