Jobst Women's Casual Knee High Socks 8-15 mmHg are manufactured by Jobst with a fabric blend of 51% Acrylic, 42% Nylon, and 7% Rubber. These Casual Compression Socks are designed to provide therapeutic compression to treat leg swelling and aching legs. These casual stocking socks are used for preventative circulation care. Jobst Knee High Trouser Socks are dressy Compression Stockings used for treating mild symptoms of deep vein thrombosis, chronic venous insufficiency, lymphedema, and varicose veins. Jobst Women's Knee High Trouser Socks provide a mild gradient compression range of 8 to 15 mmHg. These Jobst Trouser Compression Socks keep feet dry and comfortable. Equipped with a non-constricting comfort band to keep socks up without binding or pinching, these Jobst Knee High Trouser Compression Socks have the appearance of fashion socks. This fashionable appearance is discreet. The 8-15 mmHg Compression Therapy Socks may be machine washed in a mesh laundry bag or hand washed in warm water using a mild soap or detergent. Machine dry on low heat. Jobst Women's Knee High Trouser 8-15 mmHg Compression Support Socks are sold in pairs and are available in black or sand. Sizing for the Women's Trouser Socks is based on shoe size: X-small (4 1/2 - 6 1/2), Small (7 - 9), Medium (9 1/2 - 11), Large (11 1/2 - 13).