Truform 1777 from the \LITES\" series are designed with smooth sheer denier fabric and combine traditional classic design with the added health benefits of compression technology. Used to help restore leg health and reduce symptoms of leg discomfort associated with pregnancy. Graduated compression provides two primary benefits to the legs: increased pressure on tissues beneath the skin helps reduce and prevent swelling for the wearer, and the compression action helps control the size (diameter) of the superficial veins that lie just beneath the skin, preventing the slowing of blood flow so it can flow more quickly up the leg back toward the heart. Truform graduated compression support hosiery helps maintain good circulation and leg health. The comfortable medical-grade support delivers a compressive action to the leg that is greatest at the ankle, then gradually decreases toward the heart. The amount of compression is expressed as mmHg (millimeters of mercury). Doctor-recommended to help relieve tired, heavy, and aching legs, aids in the treatment of spider veins, varicose veins, and swelling of the leg and feet. Lightweight knit construction uses a breathable weave for wearing comfort. Fit by height and pre-pregnancy weight."