Features: Medical level compression socks, 28% spandex and 72% polyamide fiber. Provide firm graduated pressure of 40-50mmHg. Reinforced heel and edge, durable and anti-slide to wear. Help prevent and relieve: varicose veins, lymphedema, phlebitis, vein thrombosis for post-surgical, fatigue, pain, swelling etc. Freely walk, sit, stand and work, open toe design, suit all attire. Easy cleaning, accept hand washing. CE Approved, high quality product.