POWERbreathe Classic Breathing Training Device, Blue - Medium Resistance Sock Bundle Still just as stowable and

Still just as stowable and lightweight as its smaller counterpart

Recycled cotton Sorino knit fabric

deeper Standard FootShape™ toe box and a more forgiving

and a WORLDWIDE RUNNING TRIBE label on the arm

Side compression laces adjustable

POWERbreathe Classic Breathing Training Device, Blue - Medium Resistance Sock Bundle Still just as stowable andBoost your lung capacity and reduce breathlessness with the POWERbreathe Classic, the worlds original drug free inspiratory muscle trainer. Often called "dumbbells for your lungs," this mechanical device uses calibrated resistance to strengthen your diaphragm and ribcage muscles, making every breath more efficient. Whether you are an athlete looking to gain a competitive edge, a singer wanting better breath control, or simply looking to improve your