Unisex Herringbone Sock. Mephisto socks are crafted from the most luxurious materials to provide natural temperature control and moisture management. These socks are uniquely designed to provide a superior walking experience when combined with Mephisto footwear. The moisture wicking fibers transport sweat away, allowing a comfortable temperature. The moderate graduated 15-20 mmHg pushes blood upward to promote blood circulation. The Benefits: promotes blood circulation, minimizes swelling and reduces fatigue. The deeper heel pocket is anatomically designed to hug the shape of your foot. The seamless toe box prevents blisters and irritation of the toes for ultimate comfort. Extra Plush Cushioning for impact resistance and protection from blisters-causing friction. SIZING: SM=Women's 5-8, MD=Women's shoe sizes 9-12 or Men's shoe sizes 7-10; LG=Men's shoe sizes 11-14.