POWERbreathe K-Series Head Valve The POWERbreathe K-Series ‘You and I’ option provides additional members of your family the opportunity to hygienically experience the benefits of using this intelligent breathing trainer. POWERbreathe K-Series Valve Heads (with mouthpiece) are available in two colours and are interchangeable, which means that you don’t necessarily need to choose the same colour valve head originally supplied with your K-Series unit.
