Sleep socks divide the pressure on the legs at each stage into different strata, and different levels and different ways to disperse the pressure according to their tightness. Sleep socks have the following effects: 1. They can improve the venous blood return to the lower extremities and reduce the pressure on the blood vessels, because sleep socks can give a way and method of decreasing the pressure from the lower extremities from the bottom to the top by means of sequential decompression, so they can gradually decrease the pressure in order from the ankle to the top. 2. They can protect the venous valves and can improve the varicose veins in the lower extremities, and sleep socks can contract the calf muscles and create a certain pressure on the The sleep socks can contract the calf muscles and form a certain pressure on the blood vessels, thus preventing the blood from flowing downward and producing the effect.