GRADUATED COMPRESSION THERAPY EFFECT: Graduated compression of 15-20 mmHg Evolyline zipper compression stockings for women/men provides maximum compression at the ankle, gradually decreases through the calf, promotes blood circulation in the legs, prevents fatigue, helps muscle recovery, helps reduce and prevent swelling in the wearer's legs and keeps the legs healthy.HIGH QUALITY MATERIAL: Support socks for women & men are made of high-quality mixture of 25% spandex and 75% nylon, which can provide long-lasting and enduring use. High-performance fabrics made of breathable and moisture-absorbing materials can maintain an optimal temperature and provide greater comfort.ZIPPERER DESIGN: The high quality and enduring zipper design makes the flight socks for women easy to put on or take off , so they stay in place even if you wear them all day outdoors. For people with leg injuries, the zipper design prevents the socks from rubbing against your legs when putting them on or taking them off.WIDE APPLICATIONS: Closed toe compression socks are for people who are sedentary and standing, they are ideal for treating varicose and spider veins, diabetes, and swollen legs and feet. Whether you are a long distance traveler, a nurse, a teacher, an office worker, a woman in labor, or you want to give these people a gift, you can't go wrong with it.S: 35-38 sizeM: 38-41 codeL: 41-45 yards