Compression stockings are used to support the venous and lymphatic systems of the leg. They offer graduated compression where maximum compression is achieved at the ankle and decreases as they move up the leg. This compression, when combined with the muscle pump effect of the calf, aids in circulating blood and lymph fluid through the legs. Product Features: 20-30 mmHg Therapeutic Support Elastic band assuring a perfect waist fit Graduated Gradient Compression Design, 100% pressure at ankle and compression lessens gradually up to calf (70%) and thigh (40%) 3-D design, perfectly fit your leg High-elastic mciro fiber are delicate, soft, velvety, stronger and do not rub at heels to make them sore Reinforced toes and heels, relief for tired aching legs and prevent thrombosis Soft and good sweat absorbency Great flexibility to eliminate muscle fatigue