Over long distances or on steep descents knees need to be protected against shocks and oscillations the tops of the r2v2 the compression apparel for your calves the k protect tab fitted in does not hinder movement and causes no discomfortduring deep descents at intense speeds this calf sleeve allows you to push the limitsimpacts with the ground are damped as this calf sleeve absorbs shocks muscles do not vibrate performance is betterit protects weakened or injured knees and help overcome