By applying gradual pressure to the limb (the pressure gradually decreases from ankle to thigh), the pressure socks are equivalent to a layer of muscle, gently squeezing the dilated vein wall, narrowing the cavity of the vein and closing the valve. So as to restore the blood flow to a normal state and promote the overall blood circulation. Pressure socks help venous return, reduce venous pressure, prevent venous blood stasis and vein wall thinning, thus effectively relieving leg pain and heavy feeling.