Size: L/XL [Provide Compression and Prevent Varicose Veins]: Calf compression socks are specially designed to apply pressure to your lower legs and gently squeeze your legs to move blood up your legs;This helps improve circulation, prevent leg swelling, blood clots as well as Varicose Veins, and reduce discomfort. [Comfortable to Wear]: Made of 25% spandex + 75% nylon, our elastic and flexible compression calf sleeves provide a comfortable, lightweight and breathable fit without squeezing your ankle, knee and skin;Meanwhile, open toe design will not crowd your toes;Better to wear your compression stockings during the day and take them off before going to bed. [Available for Everyone Who Wants Fresh Legs ]: Our medical compression calf socks are available for anyone who spends prolonged period of time standing, sitting, traveling on airplanes or in vehicles, or anyone who experiences heavy, achy or restless legs;Especially, shopping guides, doctors, nurses, pregnant women need wear these compression socks to help relieve symptoms like Spider and Varicose Veins, and slow the progress of Varicose Veins.