Size:M[Prevent Varicose Veins]:Our shin splint sleeve provides pressure to your lower leg to promote blood circulation; Compression socks not only can reduce calf pain swelling, muscle stiffness, and soreness but also prevent varicose spider veins[Provide Graduated Pressure: Our medical compression socks are designed with graduated compression(20-30mmHg); The graduated compression provides maximum compression at the ankle and decompression progressively; This decrease in pressure can cause Venous blood flow[Breathable Material and Easy to Wear]: Made of 25% spandex 70% nylon,?the calf brace is lightweight, breathable skin-friendly and durable; Your foot will not be wrapped in the footless socks, so you will not feel bounded all-day; Footless design with two cuffs easy to put on and take off[Suitable for Most People]: The open toe sock is suitable for hiking, running, baseball, gym work out and many fitness activities; The medical compression sleeve is also perfect for daily use and is the best gift for teachers, doctors, nurses, office workers, international traveler, pregnant women and diabetics