Alpha Medical"s 15-20 mmHg Compression Pantyhose combine quality with comfort. The compression factor of 9-15mmHg offers gentle graduated compression from the foot up the leg to the hip combining style with effectiveness. Graduated compression helps move the blood up the leg thus improving circulation in general. Compression hosiery is generally used for the treatment of a wide range of conditions including varicose veins, edema (swelling), tired aching legs, lymphedema, prevention of deep vein thrombosis (DVT) and the post-thrombotic syndrome. Consult your doctor if you are not sure if this product is appropriate for your condition. Alpha Medical"s 15-20 mmHg Compression Hosiery is made with a breathable cotton panty and an escarole elastic waist band that keeps the garment properly and comfortably in position. Maintaining a proper position is vital not only for comfort but for the compression pantyhose to provide proper graduated compression. Alpha Medical"s designs and produces our graduated compression hosiery with the latest most technology advanced equipment on the market. Our quality control lab uses the latest measuring equipment to help insure properly graduated compression for the maximum benefit to our customers. Size Guide For Size Chart Please see Images