Meet the PFLEXX Knee Exerciser: a simple wearable tool that helps you build muscles around your knee to become a better runner. It has Power Springs fitted on either side of the knee joint to strengthen it and build muscle in the quad, hamstring, calf and glutes.
More gadgets like this ➡️ : here
The sleeve is made from Advansa Thermo°Cool textile, so it keeps you warm in cold weather. It keeps the blood flowing and speeds up recovery time.
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