Yoco Lifestyle Relief Knee High 20-30 mmHg Compression Socks, Closed Toe, Black. Breathable. Seamless design provides more comfort. Reduces swelling and supports ankle joints. Reinforced the weaving of toe and heel. Helps relieve leg swelling pains after long time standing, sedentary or heavy labor workings. Using \"intravenous fluid dynamics\" principle, incremental mining sub-pressure design to prevent leg fatigue. Helps moderate edema and relieve leg arching pain in late pregnancy