RelaxSan 820B - 15-20 mmHg unisex cotton compression socks with massaging insole 70% cotton, 13% elastane, 12% nylon, 5% polypropylene Stretch COTTON socks with massaging sole 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, massaging and comfortable travel socks with seamless toes. High quality, 100% Made in Italy For CORRECT SIZING, please refer to the IMAGE of SIZE CHART.