Consists of spandex yarn with four ways stretch advantages. It is lighter in weight with over -lock design. Provides controlled compression without leaving impression on the skin. The Achilles tendon connects calf muscle to heel bone. It may cause due to pronated foot, improper foot wear, fatigue and exercise. It is characterized by pain, muscle swelling, fatigue and improper exercise. Four ways stretch advantage provides comfort and controlled compression to legs. Helps in compression of varicose veins. Flamingo Premium Varicose Vein Stockings gives you a great relief.