These Men"s Graduated Compression Socks are Medium Compression, 18-20 mmHg and are recommended for the prevention and treatment of varicose veins, other venous insufficiencies and blood circulation problems. Our Men"s Socks are made of 34% cotton. Our collection of Graduated Compression Socks offers the support you need - comfortable, and designed for the health-conscious man 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 to the knee and thigh. This unique construction acts like a second heart - increases blood circulation and prevents general body fatigue. They are an investment in your health and last a lot longer than regular socks. They are also great for women as dress socks. Graduated Compression Socks are ideal for people who: Work on their feet, or lift and carry heavy loads. (i.e. delivery people, sales associates, laborers, construction workers.) People, who travel or work in the airline industry, at the risk of developing venous disorders due to hereditary history, and experience tiredness, aching and swelling of the lower legs. Our socks come in sizes: S, M, L, XL. Please see sizing chart. Choose Brown or Black color.