Acrylic fibresBEAUTIFUL & COMFORTABLE: Fine yarns for a beautiful sheer look; soft feel for all-day wearing comfort. Utilizing specialized fabricating machinery and medical grade fabrics, we are able to create a high-quality compression sock in a great value. Durable and opaque stocking created with therapeutic comfort in mind for both men and women.THERAPEUTIC EFFECT: Therapeutic compression hosiery which promotes blood circulation, helps relieve tired, aching, fatigued legs. Ideal for treatment of varicose and spider veins, diabetic support, long flights, nurses, maternity, and general swelling or inflammation of the legs and feet.HUMANIZED DETAIL DESIGN: Open toe styles designed with a roomy toe allowance for patients who require additional "wiggle room". The smooth and durable zippers stay snug and wont pop open. Zip-up design is easy to put on and take off. Flexible but snug in wider cuff helps the socks remain in place throughout the day. Thicker and smooth-knit stay-up top is designed for wearing comfort.