The 20-30mmHg graduated compression socks cannot cure your calf problem,but they can help reduce and alleviate pain,as well as help prevent calf injuries.<br/>Features:<br />Comfortable &amp; Flexible: The socks are made with 30% spandex and 70% chinlon material.Breathable fabric features maintain stability and provides moisture absorption.<br />20-30mmHg Graduated Compression Socks: They provide graduated compression from the ankle to upper thigh. The socks deliver 360-degree stretch for greater flexibility.<br />Effective: Help to improve blood circulation,prevent the ankle,leg and foot swelling,reduce muscle cramping and prevent the risk of developing varicose veins,pulled and leg fatigue etc.<br />Anti-slip: Anti-slip silicone points inside for upper thigh,provide good grip and prevent slipping down easily.<br />Great For Daily Use: Suitable for all compression needs,like running,hiking,volleyball,basketball,cycling,baseball,yoga,workouts or any fitness activities.The calf sleeves are also perfect for everyday use especially for athlete,teacher,flight,receptionist,office worker,elderly etc.<br/>Specification:<br />Color: Beige / Black (optional)<br />Size: M / L / XL / XXL (optional)<br />Material: 30% Spandex &amp; 70% Chinlon<br />Package weight: Approx. 109.4 - 130.7 g / 3.9 - 4.6 oz<br />Package size: 23 * 15 * 2 cm / 9.1 * 5.9 * 0.8 in<br/>Package List:<br />1* Pair of Compression Socks<br/>NOTE:<br />1. Please compare to the size chart and measure your circumference to get the best size for you.<br />2. The socks have strong pressure,please choose bigger size if you fits both of two size.<br />3. If you are initial to use or over 45 years old,please choose bigger size.<br />4. Please wash by hands and hang it outside to air dry.