RelaxSan 820-15-20 mmHg unisex cotton compression socks 57% cotton, 32% nylon, 11% elastane Stretch COTTON compression socks for men and women (1 pair). The medium graduated compression stimulates blood flow in the legs - Pressure of 15-20 mmHg at the ankle. Hygienic and comfortable travel socks with seamless toes. High quality, 100% Made in Italy For CORRECT SIZING, please refer to the IMAGE of SIZE CHART.