These Graduated Compression Knee Highs are made of Microfiber, are of 25-30 mmHg compression and are recommended for the treatment of varicose veins, other venous insufficiencies and blood circulation problems. Our collection of Graduated Compression hosiery offers the support you need - elegant and comfortable, and designed for the fashion-conscious woman who feels the physical pressures of an active lifestyle. Graduated compression provides firmer support at the foot and ankle, where you need it most, and gradually decreases up along the leg, then to the knee and thigh. This unique construction acts as a second heart - increasing blood circulation and preventing general body fatigue. They are an investment in your health and last much longer than regular hosiery. Graduated Compression Hosiery are ideal for people who: Work on their feet (i.e. waitresses, delivery people, sales associates, teachers, hairdressers.), lift and carry heavy loads. Travel or work in the airline industry, at the risk of developing venous disorders due to hereditary history. Are pregnant or have recently given birth and those who experience tiredness, aching and swelling of the lower legs. They are offered in sizes S, M, L, XL and 2XL. Available in biege and black. Note: This product gives firm compression (25-30 mm Hg). It is highly recommended to seek advice of a medical doctor or health practitioner to determine if your health condition warrants the use of products with strong compression level.