FDA-approved 20-30mmHg easy-on compression socks increase circulation and help relieve varicose veins and edema. Easy-on compression socks' zip design on these is easier to get in and out of with swollen or sensitive legs. Specify size: Regular (fits calves 10"-14 1/2"), Large (fits 10 1/2"-16 1/2") or XL (fits 11"-17 1/2"). 75% nylon/25% spandex. Hand wash. Includes 1 pair.