Take a step toward healthier feet and legs. Silver Steps™ compression socks are designed to help relieve tired, achy legs and everyday edema sometimes caused by long hours of standing or sitting. 15–20 mmHg calf compression socks are ideal for helping to prevent and reduce swelling and risk of deep vein thrombosis during travel.15-20 mmHg compression.82% nylon/18% spandex. Machine wash warm, tumble dry medium. Non-chlorine bleach only.